PRP Therapy for Hair Loss

Introduction

If you are reading this, you are likely already aware that your hair is thinning or shedding more than it used to, and you are considering PRP therapy as a possible treatment. Hair loss can be slow and frustrating to live with. It can affect how you feel about your appearance, your confidence, and even your sense of identity. Many people search for treatments that work without daily medication or surgery, and PRP therapy is one option doctors often discuss in this conversation.

PRP stands for platelet-rich plasma. It is a treatment that uses a small sample of your own blood, processed to concentrate certain healing components, and then injected into the scalp. The aim is to support hair follicles that are still alive but weakened, so they continue to produce hair rather than shrinking further.

This guide explains what PRP therapy is, how it works, who dermatologists typically consider for it, what happens during a session, what recovery looks like, what results to expect, and how it compares with other treatments for hair loss. It is written for adults who are exploring PRP as part of a wider plan for their hair, in discussion with a dermatologist.

What Is PRP Therapy for Hair Loss?

Blood is made up of red blood cells, white blood cells, plasma (the liquid part), and platelets. Platelets are best known for helping blood clot when you are cut, but they also contain a range of proteins called growth factors. These growth factors play a role in tissue repair and signalling.

Once injected into the scalp at the level of the hair follicles, the growth factors in PRP are thought to:

• Encourage blood flow to the follicle
• Prolong the active growth phase of the hair cycle
• Reduce the rate at which weakened follicles shrink and stop producing hair

PRP therapy is not a hair transplant. It does not introduce new hair or new follicles. It works on the follicles you still have. For this reason, dermatologists consider it most useful when there are still living follicles in the thinning areas, even if the hair they produce has become finer and lighter.

Why Is PRP Therapy Used for Hair Loss?

Hair loss can have many causes. The most common is androgenetic alopecia, also known as pattern hair loss. This is the genetic, hormonally driven form of hair loss that affects both men and women, usually showing up as a receding hairline and thinning at the crown in men, or as widening of the part line and overall thinning at the top of the scalp in women.

Standard treatments for pattern hair loss include topical minoxidil (a lotion or foam applied to the scalp) and oral medications such as finasteride. These work for many people but not for everyone. Some people cannot tolerate the side effects. Some prefer not to use medication long term. Some respond only partially. PRP therapy emerged as an option for people in these situations, and as something that can be combined with existing treatments rather than replacing them.

Dermatologists also sometimes use PRP for other types of hair loss, including:

• Telogen effluvium — a phase of increased shedding triggered by illness, stress, childbirth, or other factors
• Alopecia areata — an autoimmune condition causing patchy hair loss (used selectively and often alongside other treatments)
• Hair thinning after hair transplant surgery, to support the new and existing follicles

The strongest evidence for PRP therapy is in androgenetic alopecia. In other conditions, it is used more selectively and as part of a broader plan.

Who Is a Candidate for PRP Therapy?

Whether PRP is suitable depends on the type of hair loss, how advanced it is, and your overall health. A dermatologist will examine your scalp, ask about your history of hair loss, and may use a tool called a dermatoscope to look closely at the follicles. In some cases, blood tests are done to rule out thyroid disease, iron deficiency, or other medical contributors to hair loss.

People who may benefit

Dermatologists typically consider PRP for people who:

• Have early to moderate pattern hair loss
• Still have visible miniaturised hairs in the thinning areas (a sign the follicles are alive)
• Have tried topical or oral treatments with partial response, or wish to combine treatments
• Prefer a non-surgical option
• Are in general good health

People who may benefit less

PRP is less likely to help when:

• Hair loss is very advanced, with shiny, smooth scalp skin where follicles are no longer active
• An underlying medical condition (such as a thyroid disorder, iron deficiency, or scalp inflammation) is contributing to hair loss and has not been treated
• Hair loss is caused by scarring conditions (called scarring alopecias), where follicles are permanently destroyed

Situations where PRP is usually avoided

Doctors generally avoid PRP therapy in people who:

• Have a bleeding or platelet disorder
• Are taking blood-thinning medication that cannot be safely paused
• Have an active scalp infection or inflammatory skin condition
• Have certain blood cancers or are on chemotherapy
• Are pregnant or breastfeeding (the procedure is typically deferred)

The decision about whether PRP is appropriate is a clinical one, made with a dermatologist after examining your scalp and reviewing your health history.

Alternatives to Consider

PRP is one of several approaches to managing hair loss. It is rarely used in isolation, and current dermatology practice often combines treatments. Understanding the landscape helps you and your doctor decide what role PRP might play.

Topical minoxidil

Minoxidil is a lotion or foam applied to the scalp once or twice daily. It has been used for decades and is supported by extensive evidence in pattern hair loss for both men and women. It works gradually and needs to be continued long term to maintain results. Some people experience temporary increased shedding when they start, before improvement appears.

Oral finasteride (and dutasteride)

Finasteride is a tablet taken daily that blocks the conversion of testosterone to a hormone (DHT) involved in pattern hair loss in men. It is widely prescribed and supported by strong evidence. Possible side effects include changes in sexual function in a small percentage of men. Dutasteride is a related medication used in some cases. In women, these medications are used more selectively and usually under specialist supervision.

Low oral-dose minoxidil

In recent years, dermatologists have increasingly used minoxidil in low oral doses for both men and women with pattern hair loss. This is an off-label use that has gained traction based on emerging evidence and is often easier to take consistently than topical minoxidil.

Low-level laser therapy (LLLT)

LLLT uses devices such as combs, caps, or helmets that emit red light. It is non-invasive and has some supportive evidence, though results vary. It is often used alongside other treatments.

Hair transplant surgery

Hair transplantation moves hair follicles from an area of dense growth (usually the back of the scalp) to areas of thinning or baldness. It is a surgical option typically considered when hair loss is more advanced or when other treatments are not enough. It does not stop the underlying hair loss, so medical treatments are usually continued afterwards to protect existing hair.

Treating underlying causes

Hair loss caused by iron deficiency, thyroid disease, hormonal imbalances, certain medications, severe stress, or nutritional issues often improves when the underlying cause is identified and treated. This is why a dermatology assessment usually includes asking about general health and may include blood tests.

PRP therapy can be combined with most of these approaches. A dermatologist may, for example, recommend PRP alongside minoxidil and finasteride, or PRP to support a recent hair transplant.

How PRP Therapy Works

Each PRP session has three main stages: drawing blood, preparing the PRP, and injecting it into the scalp. The whole appointment typically takes 45 to 60 minutes.

Blood collection

A small amount of blood — usually between 10 and 60 millilitres, depending on the protocol — is drawn from a vein in your arm, in the same way as a routine blood test.

PRP preparation

The blood is placed in a centrifuge, a machine that spins the sample at high speed. This separates the components by weight. The platelet-rich layer is carefully removed and, depending on the protocol used by the clinic, may be processed a second time to further concentrate it.

There is no single universally agreed protocol for PRP preparation. Different clinics use different systems and settings. The platelet concentration achieved, and whether activators are added before injection, can vary. This variability is one of the reasons results in clinical studies have differed, and it is something to discuss with the dermatologist performing the procedure.

Scalp injection

The scalp is cleaned, and a topical numbing cream or a cold-air device may be used to reduce discomfort. The dermatologist then injects the PRP into the layer of skin where the hair follicles sit. The injections are made in a grid pattern across the areas of thinning, usually spaced about a centimetre apart, using a fine needle.

Some clinicians use a microneedling device alongside or instead of direct injection, creating small channels in the scalp through which the PRP is absorbed. The choice of technique is part of the clinical plan.

Preparing for a PRP Session

Preparation for PRP therapy is straightforward but important. Your dermatologist will give you specific instructions, but the following general guidance is common.

In the days before your session:

• Tell your doctor about all medications and supplements you take, including aspirin, anti-inflammatory medicines (such as ibuprofen), blood thinners, and herbal supplements like fish oil, ginkgo, or high-dose vitamin E. Some of these may need to be paused for a short period, but only on medical advice.
• Avoid alcohol for at least 24 to 48 hours beforehand, as it can affect platelet function.
• Drink plenty of water in the day or two before, which can make it easier to draw blood.
• Avoid smoking on the day of the procedure if possible, as smoking can affect blood flow to the scalp.
• Eat a normal meal before the appointment.

On the day of the session:

• Wash your hair so the scalp is clean. Do not apply hair products such as gels, sprays, or oils.
• Wear comfortable clothing with sleeves that can be rolled up for the blood draw.

If you have any health conditions, particularly those affecting blood clotting or the immune system, make sure these have been reviewed before scheduling treatment.

What Happens During a PRP Session

The procedure itself is performed in a dermatology clinic or specialist hair clinic, on an outpatient basis. You do not need to fast or have general anaesthesia.

A typical session unfolds as follows:

1. You are seated comfortably. The dermatologist or a nurse draws blood from a vein in your arm.
2. The blood is processed in the centrifuge while you wait. This usually takes 10 to 15 minutes.
3. The scalp is cleaned with an antiseptic solution. Topical anaesthetic cream may be applied to the injection areas and given time to work, or a cold-air or vibration device may be used to reduce sensation.
4. The dermatologist injects the PRP into the scalp in a grid pattern across the thinning areas, using a fine needle. You will feel pinpricks and brief pressure. Most people describe the discomfort as manageable.
5. After the injections, the scalp may be gently massaged to distribute the PRP evenly.

The session normally takes 45 to 60 minutes from arrival to departure. Most people return to their usual activities the same day, though strenuous exercise is generally avoided for the first 24 hours.

Recovery and Aftercare

PRP therapy has very little downtime. Some mild effects on the scalp are expected and settle quickly.

Immediately after the session

• The scalp may feel tender, tight, or mildly sore
• Small areas of redness or pinpoint marks at the injection sites are common
• Some people notice slight swelling on the scalp or forehead for a day or two
• Mild bruising at injection sites can occur, particularly in people prone to bruising

These effects typically resolve within 24 to 48 hours.

Aftercare guidance

Specific instructions depend on the clinic, but commonly include:

• Avoid washing the hair for the rest of the day, and use only mild shampoo when you next wash
• Avoid strenuous exercise, sauna, steam rooms, and very hot showers for 24 hours
• Avoid alcohol for at least 24 hours
• Avoid harsh hair treatments, dyes, and chemical processing for several days
• Avoid scratching or massaging the scalp vigorously
• Sleep with your head slightly elevated on the first night if swelling is a concern

Paracetamol can be used for mild soreness if needed. Anti-inflammatory medicines such as ibuprofen are usually avoided in the first few days because they may interfere with the platelet activity that PRP is intended to provide. Always follow the specific advice of the clinician who performed the procedure.

How Many Sessions and How Often

PRP is rarely a one-time treatment. It is given as a course, with follow-up sessions to maintain results, because the underlying hair loss process continues even when treatment is helping.

A common protocol involves:

• An initial course of three to four sessions, spaced about four to six weeks apart
• Maintenance sessions after that, typically every three to six months, sometimes spaced further apart depending on response

Protocols vary between clinics and between individual cases. People with more active or extensive hair loss may need more frequent sessions; people who respond well may extend the gap between maintenance treatments. The plan is usually reassessed at each visit based on how the scalp and hair are responding.

Results and What to Expect Over Time

PRP therapy works gradually. The growth cycle of hair is slow, and most of the changes that PRP supports happen at the level of the follicle before they become visible as new or thicker hair.

Typical timeline

• First 2 to 3 months: Many people notice a reduction in hair shedding before they see any new growth. Some people also notice that the hair feels stronger or that the scalp looks healthier.
• 4 to 6 months: Visible improvement in hair thickness and density is most commonly reported in this window. New, finer hairs may appear in areas that had been thinning.
• 6 to 12 months: With maintenance sessions, improvements can continue. Some people reach a plateau where the goal becomes to hold onto the gains rather than make further progress.

How much improvement to expect

Studies of PRP for androgenetic alopecia have shown improvements in hair density, hair thickness, and reduced shedding in many participants, though results vary between individuals and between studies. The differences are partly explained by variations in PRP preparation, injection technique, the type and stage of hair loss treated, and whether other treatments were used at the same time.

It is important to set realistic expectations. PRP therapy is best understood as a treatment that supports existing follicles, slows the progression of hair loss, and modestly improves hair quality and density. It does not regrow hair where follicles have been lost, and it does not stop the genetic process behind pattern hair loss. For many people, the most useful way to think about PRP is as part of a long-term plan to protect the hair they have.

If little or no improvement is seen after the initial course of sessions, dermatologists usually reassess the plan rather than continuing indefinitely. The diagnosis may be revisited, other contributors to hair loss reviewed, and combinations of treatments adjusted.

Risks and Side Effects

PRP therapy is considered a low-risk procedure because it uses your own blood, which means there is no risk of allergic reaction to a foreign substance and no risk of bloodborne infection from a donor.

The most common side effects are mild and short-lived:

• Scalp tenderness or soreness for a day or two
• Redness and small marks at the injection sites
• Mild swelling of the scalp or forehead
• Small bruises
• Headache after the session
• Itching as the scalp settles

Rarer risks include:

• Infection at the injection site — very uncommon when sterile technique is used
• Increased shedding in the first weeks, which can occur with several hair-loss treatments as the hair cycle shifts; this is typically temporary
• Nerve irritation in the scalp, causing temporary numbness or tingling
• An allergic-type reaction to topical anaesthetic or antiseptic used during the procedure

Serious complications are very rare. The most important safeguards are that the procedure is performed by a trained clinician using sterile equipment, and that anyone with a relevant medical condition or medication is identified before treatment begins.

Choosing a Clinician and Clinic

Because PRP protocols vary between clinics, the experience and approach of the clinician matter. General things to look for include:

• A dermatologist or other clinician with specific training in medical hair loss and in performing PRP therapy
• A proper assessment before treatment is offered, including a discussion of your hair loss history, scalp examination, and blood tests where appropriate
• Honest discussion of what PRP can and cannot do for your specific pattern of hair loss
• Use of sterile, single-use equipment
• A clear plan for sessions, follow-up, and how response will be assessed
• Willingness to discuss other treatment options — including medications and, where relevant, surgery — rather than offering PRP in isolation

If a clinic promises rapid, dramatic regrowth from PRP alone, or recommends an unusually long course of treatment without reassessment, it is reasonable to seek a second opinion.

Living with Hair Loss During and After Treatment

Hair loss is more than a physical change. Many people describe a significant emotional impact, including reduced confidence, anxiety about appearance, and feelings of grief or frustration. Treatment can help, but managing expectations is part of the process.

Some practical things that often help alongside medical treatment:

• Working with a hairstylist familiar with thinning hair, who can suggest cuts and styling approaches that improve coverage
• Being gentle with the hair — avoiding tight hairstyles, harsh chemicals, and frequent heat styling
• Eating a balanced diet with adequate protein, iron, and other nutrients that support hair
• Addressing stress through sleep, exercise, and, where helpful, professional support
• Talking openly with friends or family about how hair loss affects you, rather than carrying it alone

If hair loss is significantly affecting your mood or daily functioning, raising this with your doctor is appropriate. It is a recognised aspect of living with hair loss and not something to dismiss.

Frequently Asked Questions

How long before I see results from PRP therapy?

Most people notice less shedding within the first two to three months, with visible improvements in thickness and density typically appearing between four and six months. Hair growth is slow, and the full effect of an initial course of sessions is usually assessed at around six months.

Is PRP therapy painful?

The blood draw feels like a routine blood test. The scalp injections cause brief pinpricks and pressure. Topical numbing cream, cold-air devices, or vibration tools are often used to reduce discomfort. Most people describe the procedure as manageable rather than painful.

How many sessions will I need?

A typical initial course is three to four sessions spaced four to six weeks apart, followed by maintenance sessions every three to six months. The exact plan depends on your pattern of hair loss and how you respond.

Can PRP regrow hair where I am completely bald?

PRP works on follicles that are still alive but weakened. In areas where the scalp is smooth and shiny and follicles are no longer active, PRP is unlikely to produce new hair. In such cases, dermatologists may discuss hair transplant surgery as a separate option.

Can PRP be combined with minoxidil or finasteride?

Yes. PRP is often used alongside topical minoxidil, oral finasteride, low oral-dose minoxidil, or other treatments. Combining treatments is a common approach in pattern hair loss and is something your dermatologist will discuss with you.

Is PRP a permanent solution?

Pattern hair loss is a long-term, progressive process driven by genetics and hormones. PRP supports the follicles but does not change the underlying process. Maintenance sessions are usually needed to hold onto results, and if PRP is stopped, the original pattern of hair loss tends to resume gradually.

Are there any people who should not have PRP?

PRP is generally avoided in people with bleeding or platelet disorders, those on blood thinners that cannot be paused, those with active scalp infections, those with certain blood cancers or on chemotherapy, and during pregnancy or breastfeeding. A dermatologist will review your full health history before recommending treatment.

Is PRP therapy used in children?

PRP therapy for hair loss is performed in adults. Hair loss in children is uncommon and usually has different causes, which are assessed and managed by a paediatrician or dermatologist.

Can PRP be used after a hair transplant?

Yes. Some surgeons use PRP around the time of hair transplant surgery, with the aim of supporting the transplanted follicles and the existing hair around them. Whether this is offered depends on the surgeon's practice.

What happens if PRP does not work for me?

If there is little or no improvement after an initial course of sessions, your dermatologist will usually reassess your diagnosis, look for other contributing factors, and discuss alternative or additional treatments. PRP is one option among several, and not responding to it does not mean other treatments will not help.

Conclusion

PRP therapy for hair loss is a non-surgical treatment that uses a concentrated portion of your own blood to support hair follicles in areas of thinning. It is most commonly used for pattern hair loss in adults, often as part of a broader plan that may include medications and, in some cases, hair transplant surgery.

It is not a cure for hair loss, and results vary between individuals. For people in the right stage of hair loss, with realistic expectations and a clinician experienced in medical hair restoration, PRP can be a useful part of long-term hair care. The decision about whether it suits your situation is best made after a full assessment with a dermatologist who can examine your scalp, review your history, and discuss the options available to you.