Hair Transplant Healing Timeline: Receiving Area Recovery

Hair Transplant Healing Timeline: Receiving Area Recovery When it comes to undergoing a hair transplant, understanding the healing timeline in the receiving area is essential for a successful outcome. Patients often wonder how soon the transplanted hair area will heal and what to expect during the recovery process. In this article, we will explore the answers to these questions and provide valuable insights into the hair transplant healing time and recovery timeline.

Key Takeaways:

• Understanding the healing timeline of the transplanted hair receiving area is crucial for optimal results.
• Factors such as individual healing abilities, surgical technique, and post-operative care can affect the healing process.
• The step-by-step healing process involves initial scabbing, shedding of transplanted hair, and eventual growth.
• Patients should follow post-operative care instructions to promote proper healing and minimize complications.
• Signs of a fully healed hair transplant area include absence of scabs, reduced redness, and natural-looking hair growth.

Factors Affecting Hair Transplant Healing

The healing process of the transplanted hair area can be influenced by various factors. Understanding these factors is important to ensure a smooth recovery and optimize results after a hair transplant. Here, we will discuss the key factors that can impact the healing time and overall recovery experience.

1. Skill and expertise of the surgeon: The skill and expertise of the surgeon who performs the hair transplant procedure can significantly affect the healing process. A skilled surgeon will use proper techniques and ensure minimal trauma to the donor and recipient areas, promoting faster and more efficient healing.
2. Quality of the donor area: The quality of the donor area where the hair follicles are harvested plays a crucial role in healing. A healthy and robust donor area promotes faster healing and reduces the risk of complications.
3. Post-operative care: Following proper post-operative care instructions is vital for optimal healing. The way patients care for their transplanted hair area, such as keeping it clean, avoiding excessive touching, and protecting it from sun exposure, can impact the healing process.
4. Overall health and lifestyle: Factors such as overall health, lifestyle choices, and maintenance of a healthy diet can influence the healing process. Smoking, excessive alcohol consumption, and poor nutrition can delay healing and affect the final outcomes of the hair transplant.
5. Age and genetics: Age and genetics can also play a role in the healing process. Younger individuals tend to have faster healing times, while genetic factors may influence the density and quality of hair growth in the transplanted area.

In summary, several factors can impact the healing of the transplanted hair area after a hair transplant procedure. By considering these factors and following the guidance of a qualified surgeon, patients can optimize the healing process and achieve the best possible outcomes.

Hair Transplant Healing Process

The healing process of transplanted hair is a gradual and intricate journey that spans several stages. Understanding this process is essential for individuals undergoing a hair transplant. Here, we will outline the step-by-step healing process of the transplanted hair area, providing a comprehensive overview of each stage.

1. Initial Post-Operative Phase

Immediately after the hair transplant procedure, the receiving area may experience some redness, swelling, and mild discomfort. These are common side effects that will gradually subside over time. It is essential to follow the post-operative instructions provided by your surgeon to ensure optimal healing.

“During the initial post-operative phase of the hair transplant healing process, it is crucial to keep the recipient area clean and dry. Avoid direct exposure to sunlight and refrain from scratching or rubbing the transplanted hair area to prevent any damage or infection.”

2. Formation of Scabs and Crusts

Within a few days after the hair transplant, scabs and crusts will start to form in the receiving area. These scabs are a natural part of the healing process and serve as protective barriers for the newly transplanted hair follicles. It is important not to pick or scratch these scabs to avoid disrupting the healing process.

“While the formation of scabs and crusts may be slightly uncomfortable, it is crucial to resist the temptation to remove them. Allow the scabs to naturally shed off during the healing process to ensure optimal growth and minimize the risk of complications.”

3. Shedding of Transplanted Hair

Within two to three weeks after the hair transplant, the transplanted hair will enter a phase called telogen effluvium, where the hair shafts shed. This is a normal part of the healing process and should not be a cause for concern. Shedding allows the transplanted hair follicles to enter a resting phase before initiating new growth.

“Experiencing hair shedding after a hair transplant can be disheartening, but it is crucial to understand that it is a temporary phase. The shedding initiates a natural cycle of hair growth, ensuring stronger and more robust hair in the long run.”

4. New Hair Growth

After the shedding phase, new hair growth will gradually begin in the transplanted follicles. Initially, the hair may appear thin and sparse, but over time, it will thicken and become more dense. Patience is key during this phase, as it takes several months for the new hair to reach its full potential.

“The development of new hair is a positive indication that the transplanted hair follicles are successfully integrating into the recipient area. Individuals should monitor their progress over the coming months, as the transplanted hair continues to grow and restore their natural appearance.”

5. Complete Healing and Final Results

The complete healing process of the transplanted hair area can take anywhere from six months to a year, depending on individual factors and the extent of the hair transplant. At this stage, patients can expect their hair to have fully grown and assume a natural appearance, blending seamlessly with their existing hair.

“Achieving the final results of a hair transplant requires patience and adherence to the healing process. By allowing the transplanted hair area to fully heal, individuals can enjoy the transformative and long-lasting benefits of their hair restoration journey.”

Understanding the healing process of transplanted hair is crucial for patients undergoing a hair transplant procedure. By knowing what to expect at each stage, individuals can make informed decisions and actively participate in their healing journey, maximizing the chances of successful outcomes.

Hair Transplant Recovery Timeline

Understanding the timeline for hair transplant recovery is essential for patients undergoing the procedure. It helps set realistic expectations and allows them to monitor the healing process effectively. The recovery timeline focuses on the healing progress specifically in the receiving area, where the transplanted hair is placed.

The hair transplant recovery timeline can vary from person to person, as it depends on several factors such as the individual’s healing ability, the size of the transplant, and the surgical technique used. However, there are general stages that most individuals go through during the recovery process.

Stage 1: Immediate Post-Operative Period (Days 1-7)

During the first week after the hair transplant procedure, patients can expect to experience some swelling, redness, and mild discomfort in the receiving area. The transplanted hair will typically start shedding within this timeframe, which is a normal part of the healing process.

Stage 2: Early Healing Phase (Weeks 2-4)

In the following weeks, the redness and swelling will subside gradually. The transplanted hair follicles will enter a resting phase known as the telogen phase during this stage. It is important to note that not all transplanted hairs will shed, as some may continue to grow or enter a dormant phase until they start growing again.

Stage 3: Transition and Growth (Weeks 4-8)

Between weeks 4 and 8, patients may notice new hair growth in the transplanted area. At this stage, the hair follicles are actively entering the anagen phase, which is the growth phase of the hair cycle. The growth rate may vary, but patients can expect to see consistent progress during this period.

Stage 4: Continued Improvement (Months 3-6)

From months 3 to 6, the transplanted hair will continue to grow, and patients will start experiencing significant improvement in hair density. The length and thickness of the hair will gradually increase, resulting in a more natural appearance.

Stage 5: Final Results (Months 9-12+)

By around the 9th to 12th month, patients usually achieve their final hair transplant results. The transplanted hair will have fully grown, and the density will be maximized. However, it’s important to note that the final outcome may still vary depending on individual factors.

It’s crucial to remember that every individual’s hair transplant recovery timeline may differ slightly. Therefore, all the stages mentioned above are general guidelines and can vary depending on several factors as mentioned earlier.

Post-Operative Care for Hair Transplant

After undergoing a hair transplant, proper post-operative care is crucial for the healing and recovery of the hair transplant receiving area. By following these essential guidelines, patients can optimize the healing process and ensure successful results.

1. Protect the Transplanted Area

Immediately after the surgery, it is important to protect the transplanted area from any potential trauma or injuries. Avoid touching or scratching the area and be cautious while washing or styling your hair. Follow the instructions provided by your surgeon for specific care instructions.

2. Keep the Area Clean

Maintaining cleanliness of the transplanted area is vital for preventing infections and promoting healing. Gently clean the area according to the advice of your surgeon, using mild, non-irritating cleansers. Avoid harsh shampoos, excessive rubbing, or scrubbing the area.

3. Avoid Exposure to Direct Sunlight

Protect the transplanted area from direct sunlight, as it can cause sunburn or damage the newly transplanted hair. Wear a hat or use sunscreen with a high SPF when exposed to the sun.

4. Follow the Medication Schedule

Your surgeon may prescribe medications such as antibiotics or painkillers to facilitate the healing process and manage post-operative discomfort. Follow the medication schedule provided by your surgeon and notify them of any side effects or concerns.

5. Avoid Strenuous Activities

Engaging in strenuous activities can put unnecessary strain on the transplanted area, hindering the healing process. Avoid activities that involve heavy lifting, intense workouts, or sports that may lead to sweating or physical contact with the area.

6. Adhere to a Healthy Lifestyle

Eating a balanced diet, staying hydrated, and getting enough rest can help optimize the healing process. Proper nutrition and hydration provide the necessary nutrients for tissue repair and regeneration.

“Proper post-operative care is crucial for the healing and recovery of the hair transplant receiving area.”

By following these post-operative care guidelines, patients can promote optimal healing and significantly enhance the success of their hair transplant procedure. The meticulous attention to care and following the recommended guidelines will ensure that patients achieve the best possible long-term results.

Signs of Healed Hair Transplant Area

After undergoing a hair transplant, it’s natural to wonder how to tell if your receiving area has fully healed. The signs and indicators of a successfully healed hair transplant area can provide reassurance and help you gauge your progress. Here are some key signs to look out for:

1. No visible scabs or crusts: As the healing process progresses, any scabs or crusts that were present in the receiving area should completely disappear. This indicates that the transplanted hair follicles have successfully integrated with the surrounding tissue.
2. Decreased redness and inflammation: In the initial stages of healing, it’s common for the receiving area to appear reddish and inflamed. However, as the healing continues, these symptoms should gradually fade away, leaving behind a more natural-looking scalp.
3. New hair growth: One of the most exciting signs of a healed hair transplant area is the emergence of new hair growth. Initially, this may appear thin and sparse, but over time, the transplanted hair follicles should start growing thicker and denser.
4. Improved texture and feel: As the healing progresses, you may notice that the skin in the receiving area becomes smoother and more similar in texture to the surrounding scalp. The new hair follicles should also feel firmly rooted and secure.

It’s important to note that the healing process can vary from person to person, and these signs may manifest at different rates. If you have any concerns about the healing of your hair transplant receiving area, it’s always best to consult with your hair transplant specialist for personalized guidance.

Tips for Faster Hair Transplant Healing

After undergoing a hair transplant, many patients desire a speedy recovery and faster healing in the receiving area. To help you achieve optimal healing and a quicker recovery, we have compiled practical tips and strategies that you can implement throughout your journey. By following these recommendations, you can promote a faster healing process and enjoy the full results of your hair transplant.

1. Take Care of the Transplanted Area

Proper care of the transplanted area is essential for faster healing. Follow your surgeon’s instructions, including washing the area gently, avoiding excessive touching or scratching, and protecting it from direct sunlight. By maintaining a clean and protected environment, you can facilitate the healing process effectively.

2. Follow Post-Operative Care Guidelines

Adhering to the post-operative care guidelines provided by your surgeon is crucial for quick and successful healing. These guidelines may include specific instructions on medication, bandaging, and scalp massage techniques. By following these guidelines diligently, you can optimize the healing process and minimize the risk of complications.

3. Maintain a Healthy Lifestyle

A healthy lifestyle can greatly contribute to faster healing after a hair transplant. Ensure you eat a balanced diet rich in nutrients, vitamins, and minerals to promote overall healing and hair growth. Regular exercise and stress-management techniques, such as yoga or meditation, can also enhance the healing process.

4. Avoid Smoking and Alcohol

Smoking and alcohol consumption can negatively impact the healing process. Both substances can restrict blood flow, impair immune function, and delay wound healing. Avoiding smoking and excessive alcohol consumption during the recovery period can significantly contribute to faster healing and better overall outcomes.

5. Manage Stress Levels

Stress can have a detrimental effect on the healing process. Make an effort to manage stress levels through relaxation techniques, such as deep breathing exercises or engaging in activities you enjoy. By reducing stress, you can help your body focus its energy on healing and recovery.

“Following these tips and strategies can promote faster healing in the receiving area after a hair transplant, ensuring a quicker recovery and optimal results.”

By implementing these tips and strategies, you can maximize your chances of faster healing after a hair transplant. However, it is important to remember that healing times may vary from person to person. Consult with your surgeon to devise a personalized recovery plan based on your specific needs and circumstances. With patience, proper care, and a healthy lifestyle, you can enhance the healing process and enjoy the full benefits of your hair transplant.

Potential Complications and How to Address Them

While hair transplant procedures are generally safe and effective, there is a small risk of complications during the healing process of the transplanted hair area. It’s important to be aware of these potential complications and know how to address them promptly to ensure optimal healing and successful outcomes.

1. Infection

Infection can occur if proper post-operative care is not followed or if the surgical site is not kept clean. Signs of infection may include redness, swelling, increased pain, or drainage from the transplant area. If you suspect an infection, it is crucial to consult your healthcare provider immediately. They may prescribe antibiotics or recommend other treatments to address the infection effectively.

2. Excessive Bleeding

Although some bleeding is normal during the initial stages of the healing process, excessive bleeding may indicate a problem. If you experience prolonged or heavy bleeding from the transplant area, apply gentle pressure using a clean cloth or gauze and contact your surgeon for further guidance.

3. Poor Graft Survival

In some cases, the transplanted grafts may not survive as expected. This can be due to factors such as inadequate blood supply, improper handling of the grafts, or underlying health issues. If you notice an unusually low survival rate of transplanted grafts, it is essential to consult your surgeon for a thorough evaluation. They may recommend additional treatments or adjustments to ensure better graft survival.

4. Swelling

Swelling is a common side effect following a hair transplant. However, if the swelling is severe or persists for an extended period, it may be a sign of an underlying issue. Elevating your head while sleeping, applying cold compresses, and taking prescribed medications can help reduce swelling. If the swelling does not improve or worsens, consult your surgeon for further evaluation.

5. Scarring

Scarring is a natural part of the healing process after a hair transplant. However, some individuals may develop hypertrophic or keloid scars, particularly if they are prone to such scarring. To minimize the risk of excessive scarring, it is essential to follow your surgeon’s post-operative care instructions diligently. If you notice abnormal scarring, consult your surgeon for appropriate treatment options.

6. Uneven Hair Growth

While it is normal for transplanted hair to shed within a few weeks after the procedure, subsequent hair growth should be even and natural-looking. If you notice uneven hair growth patterns or patches of sparse hair, discuss your concerns with your surgeon. They may recommend additional grafting or other treatments to achieve more balanced results.

Remember, complications after a hair transplant are rare, but it is important to be aware of the potential risks and know how to address them promptly. Always consult your surgeon if you have any concerns or experience any unusual symptoms during the healing process.

Importance of Patience in Hair Transplant Recovery

When it comes to achieving optimal healing and successful outcomes after a hair transplant, patience is key. While it’s natural to be eager for immediate results, understanding the importance of allowing the body to heal naturally over time is crucial. Patience not only promotes better healing but also ensures the long-term success of the hair transplant.

During the recovery period, the transplanted hair area undergoes a complex healing process that requires time and care. The body needs to establish a strong blood supply to nourish the transplanted follicles, allowing them to anchor firmly and flourish. It is through this gradual healing process that patients can experience natural-looking, permanent hair growth.

Impatience can often lead patients to seek quick fixes or rush the recovery process, which can have detrimental effects. Trying to speed up healing through aggressive measures or not following post-operative care instructions can hinder the growth of transplanted hair and increase the risk of complications.

To emphasize the importance of patience, here are the key benefits of allowing the body to heal naturally during hair transplant recovery:

1. Enhanced Hair Growth: Giving your body ample time to heal allows the transplanted hair follicles to establish a strong blood supply and adapt to their new surroundings. This results in improved hair growth and a more natural appearance.
2. Reduced Risk of Complications: Rushing the recovery process may lead to complications such as infection, inflammation, or poor hair growth. Patience ensures proper healing, minimizes the risk of complications, and increases the likelihood of successful results.
3. Long-lasting Results: Patience plays a critical role in achieving long-lasting results after a hair transplant. Allowing the body to heal naturally ensures that the transplanted hair follicles are firmly anchored and can thrive for years to come.

While waiting for your hair transplant to fully heal and hair growth to occur, it’s essential to practice good self-care and follow post-operative instructions provided by your surgeon. This includes avoiding activities that may cause trauma or stress to the recipient area and maintaining proper hygiene.

Remember, patience is not only a virtue but also an essential factor in the success of your hair transplant. By exercising patience and giving your body the time it needs to heal, you can achieve the best possible results and enjoy your restored hair with confidence.

Follow-up Care and Maintenance

Once the receiving area of your hair transplant has fully healed, it is essential to prioritize follow-up care and maintenance to ensure long-term success and the longevity of your transplanted hair. By implementing these recommended practices, you can maintain the health and appearance of your hair for years to come.

Maintaining a Healthy Scalp

To support optimal hair growth and minimize the risk of complications, it is crucial to maintain a healthy scalp. Here are a few tips to help you achieve that:

• Regularly cleanse your scalp: Use a gentle shampoo specifically formulated for post-transplant care to keep your scalp clean without irritating the healing follicles.
• Avoid excessive scratching or picking: Refrain from scratching your scalp excessively or picking at scabs as this can disrupt the healing process and potentially lead to infections.
• Protect your scalp from the sun: Shield your scalp from harmful UV rays by wearing a hat or using sunscreen specifically designed for the scalp.

Healthy Hair Care Practices

In addition to maintaining a healthy scalp, following proper hair care practices is crucial for the maintenance of your transplanted hair. Consider the following recommendations:

• Gentle combing or brushing: Use a wide-toothed comb or a soft brush to avoid pulling or tugging on your hair, especially in the transplanted areas.
• Avoid excessive heat styling: Minimize the use of heat-styling tools such as flat irons or curling irons as they can cause damage to your hair and potentially disrupt the transplanted follicles.
• Choose hair products wisely: Opt for hair care products that are gentle, sulfate-free, and designed for your specific hair type to maintain the health and integrity of your transplanted hair.

Schedule Regular Follow-up Appointments

To ensure ongoing monitoring of your hair transplant’s progress, it is essential to schedule regular follow-up appointments with your transplant surgeon. These appointments provide an opportunity for your surgeon to assess your hair growth, address any concerns, and make necessary adjustments to your maintenance routine.

Protective Measures

In certain circumstances, additional protective measures may be advisable, such as:

• Using specialized hair products: Your transplant surgeon may recommend specific hair care products or supplements to support healthy hair growth and minimize the risk of complications.
• Avoiding extreme physical activities: Depending on your specific case, it may be recommended to avoid strenuous exercises or activities that could put excessive strain on your scalp until full healing has occurred.

By following these post-recovery care practices and maintaining a regular follow-up schedule, you can enjoy the long-term benefits and success of your hair transplant. Remember, each individual’s needs may differ, so it is essential to consult with your transplant surgeon for personalized guidance and advice.

Benefits of Follow-up Care and Maintenance
Ensures optimal hair growth and density Minimizes the risk of complications Prolongs the longevity of the transplanted hair Allows for early detection and management of any issues Evaluates the overall success of the hair transplant

Lifestyle Factors That Can Enhance Healing

When it comes to the healing process of the transplanted hair area, there are certain lifestyle factors that can make a significant difference. By incorporating healthy habits into your daily routine, you can promote faster healing and encourage healthier hair growth. Let’s explore some of these lifestyle choices:

Diet

Your diet plays a crucial role in promoting healing and overall well-being. By consuming a balanced diet rich in vitamins, minerals, and antioxidants, you can provide your body with the necessary nutrients for optimal healing. Focus on incorporating foods such as fruits, vegetables, lean proteins, and whole grains into your meals. Additionally, stay adequately hydrated by drinking plenty of water throughout the day.

Exercise

Engaging in regular exercise not only benefits your overall health but can also enhance the healing process after a hair transplant. Exercise increases blood flow, delivering oxygen and nutrients to the transplanted hair area, thereby promoting healing. Incorporate moderate-intensity activities such as walking, jogging, or swimming into your routine, as guided by your healthcare provider.

Stress Management

Stress can have a negative impact on healing. It is important to find healthy ways to manage stress during your recovery period. Practicing relaxation techniques such as deep breathing exercises, meditation, and yoga can help reduce stress levels and promote a positive healing environment. Additionally, engage in activities that bring you joy and help you relax, such as reading, listening to music, or spending time in nature.

Quit Smoking

If you are a smoker, quitting smoking is essential for optimizing the healing process after a hair transplant. Smoking can restrict blood flow, impair oxygen delivery, and delay healing. Talk to your healthcare provider about resources and strategies to quit smoking if needed.

Incorporating these lifestyle factors into your daily routine can significantly enhance the healing process of the transplanted hair area. By nurturing your body with a balanced diet, staying active, managing stress, and quitting smoking, you can promote faster healing and achieve long-lasting, healthy hair growth.

Conclusion

In conclusion, understanding the timeline and factors influencing the healing of the hair transplant receiving area is crucial for achieving successful outcomes. By following proper post-operative care, being patient, and considering lifestyle factors, patients can optimize healing and enjoy the full benefits of their hair transplant.Hair Transplant Healing Timeline: Receiving Area Recovery

During the healing process, it is important to adhere to the guidelines provided by your hair transplant specialist. This includes avoiding strenuous activities, protecting the receiving area from direct sunlight, and refraining from scratching or picking at the transplanted hair. By following these instructions, you can minimize the risk of complications and promote a smooth healing process.

Additionally, lifestyle factors such as maintaining a healthy diet, exercising regularly, and managing stress levels can further enhance the healing of the transplanted hair area. These practices support overall well-being and contribute to optimal healing and hair growth.

FAQ

How soon does the hair transplanted receiving area heal?

The healing time for the hair transplanted receiving area can vary from person to person. On average, the initial healing phase may take about 7 to 10 days, during which scabs and crusts may form and eventually fall off. However, complete healing and the growth of new hair can take several months, typically around 9 to 12 months.

What are the factors that can affect hair transplant healing?

Several factors can influence the healing process of the transplanted hair area. These include the patient’s overall health, the technique used during the hair transplant procedure, the extent of the transplantation, the quality of post-operative care, and any underlying medical conditions or medications that may affect healing.

What is the healing process of the transplanted hair area?

The healing process of the transplanted hair area involves several stages. After the procedure, the scalp may be tender and red for a few days. In the following weeks, scabbing and crusting may occur as the grafts settle. Over time, the transplanted hair will shed before regrowing, and the scalp will gradually return to a normal appearance.

What is the general timeline for hair transplant recovery?

The timeline for hair transplant recovery can vary, but generally, the initial healing phase takes a few weeks. Within the first month, the transplanted hair may shed, but new growth will gradually emerge in subsequent months. It typically takes around 6 to 12 months for the final results to become apparent.

What should I do for post-operative care after a hair transplant?

Proper post-operative care is crucial for the healing and success of a hair transplant. It is important to follow your surgeon’s instructions, which may include avoiding excessive physical activity, refraining from scratching or picking at the scalp, and gently washing the hair as directed. It is also essential to protect the scalp from direct sunlight and avoid smoking or alcohol consumption, which can hamper healing.

How can I tell if my hair transplant receiving area has healed?

Signs of a healed hair transplant receiving area include the absence of scabs or crusts, reduced redness and swelling, and the emergence of new hair growth. It is important to note that the complete healing process may take several months, so patience is required in assessing the final outcome.

Are there any tips to promote faster hair transplant healing?

While the healing process cannot be rushed, several tips can assist in promoting faster healing. These include following a balanced diet rich in nutrients, avoiding smoking and excessive alcohol consumption, practicing stress management techniques, and properly caring for the scalp by gently washing and moisturizing as advised by your surgeon.

What potential complications can arise during the hair transplant healing process?

Although uncommon, potential complications during the hair transplant healing process can include infection, excessive bleeding, scarring, or poor graft survival. If you experience any concerning symptoms or notice any abnormalities, it is important to consult your surgeon promptly for proper assessment and guidance.

Why is patience important in hair transplant recovery?

Patience is crucial in hair transplant recovery as it takes time for the transplanted hair follicles to settle and for new hair growth to occur. Rushing the healing process or expecting immediate results can lead to unnecessary stress and disappointment. Allowing the body to naturally heal ensures the best chance of achieving optimal results.

What is the recommended follow-up care and maintenance after a hair transplant?

After the receiving area has healed, it is important to stay in touch with your surgeon for regular follow-up appointments. They will monitor your progress, provide guidance on hair care products to use, and advise on any additional treatments, such as PRP (Platelet-Rich Plasma) therapy, that could benefit the health and growth of your transplanted hair.

Are there any lifestyle factors that can enhance the healing of the transplanted hair area?

Yes, several lifestyle factors can positively influence the healing process of the transplanted hair area. Maintaining a healthy diet rich in vitamins and minerals, staying hydrated, managing stress levels, getting regular exercise, and refraining from smoking can all contribute to faster healing and promote optimal hair growth.