Procedure

PRP for Hair Loss

Blood is drawn from your arm, spun to concentrate the platelets, and injected into the thinning parts of the scalp. It can thicken hair that is still there. It does not bring back hair that has been gone for years, the evidence is mixed, and the effect fades once you stop.
Dr. Schwarz, MD · Board-certified dermatologistLast reviewed September 8, 2026
16:9 hero for PRP for Hair Loss. Never cropped: the tone strip and the corner logo depend on the full frame.

Start here

PRP is the treatment I get asked about most and the hardest to answer cleanly: some people come back at six months visibly denser in the photographs, others finish four sessions and a large bill and see nothing, and I cannot tell in advance which you will be. It works best on top of a stable routine, not instead of one — if you are not already on minoxidil and have not discussed finasteride, dutasteride, spironolactone or low-dose oral minoxidil, that is where we start.

The other thing I say every time: this is maintenance, not a cure. It does not restart a follicle that closed years ago, the benefit fades over months once sessions stop, and if repeating it indefinitely is not realistic for you, say so before the first session rather than after the fourth.

— Dr. Schwarz, Board Certified Dermatologist

Key Facts

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Also calledPlatelet-rich plasma, PRP scalp injections, platelet-rich plasma therapy for hair
DowntimeNone to a day. A tender, tight scalp is usual and most people go back to work the same day
SessionsCommonly 3 to 4 sessions about a month apart, then maintenance every 3 to 6 months. Protocols differ a lot between clinics
Typical costOften about $500 to $1,500 per session in the US, usually sold as a package of three or four. Insurance almost never covers it
Results timelineLess shedding first, often within 2 to 3 months. Any change in thickness takes 3 to 6 months and is easiest to see in side-by-side photographs
PainThe injections sting and the scalp is sensitive. Ice, vibration or numbing cream is normal. The visit takes under an hour
Skin tone safetyNo light and no heat are used, so the pigment risks that come with lasers do not apply here. Suitable for all skin tones

What It Is

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Blood is drawn from your arm, about as much as a routine blood test, and spun in a centrifuge that separates it into layers by weight. The platelet-rich layer is drawn off and injected across the thinning scalp in a grid of small injections about a centimeter apart. Nothing goes in that did not come out of you, unless the clinic adds something, and some do. Most of the appointment is the drawing and the spinning.

How It Works

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Platelets clump together to stop bleeding, and they carry growth factors they release when tissue is injured. The idea is that a concentrated dose of those growth factors nudges a shrinking follicle back toward a longer growing phase and a thicker hair shaft, partly by improving its blood supply. That rests on laboratory work and on what platelets do in wound healing; it has not been shown step by step in a human scalp. The needle itself creates hundreds of tiny controlled injuries, and it is genuinely unclear how much of any benefit comes from the plasma and how much from the needling. PRP does not change the hormone signal driving pattern hair loss, which is why it does not stop the process, and why hair already replaced by smooth scalp does not come back.

Skin is about two millimetres thick on the face. How deep a treatment reaches decides what it can change, and whether it treats all of the skin or scattered columns of it decides how long you take to heal.

How it works
Compare
Skin basics
EPIDERMISDERMISFAT0.05 mm — pigment0.5 mm — texture + pores1.0 mm — collagen1.5 mm — deep dermisPEELNON-ABLATIVE LASERABLATIVE LASERREACHES THE MID DERMIS

This works around one to one and a half millimetres down, in the middle of the dermis where collagen is made. That is the depth that changes scarring and firmness, and it is also why the downtime is longer and the result takes months to appear. Needles make hundreds of separate channels and leave the skin between them untouched. That untouched skin is what heals the rest, so recovery is quick — but a needle only injures the skin to start repair. It removes nothing.

A peel or a scrub takes the skin off evenly from the surface down. Everything above the line goes and nothing below it is touched, which is why peels suit surface pigment and rough texture, and why the whole face flakes for a few days after.

The light passes through the surface and heats a column underneath it. The surface stays whole, so you leave red rather than raw — and it takes a course of sessions rather than one.

The laser removes columns of skin outright: the white gaps here are tissue that is gone, and new skin grows in from the sides. The strongest of the four, and the longest to heal.

The outer layer, and the only one anything in a jar reaches. It renews itself constantly: a cell made at the bottom takes about a month to reach the surface and flake off. Most of what a skincare product does, it does here.

The living layer underneath, holding the blood vessels, the nerves and the collagen. It is where lasting change happens and it is hard to reach: most of what is sold for the skin never gets this far.

What It Treats

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No strong evidence for any condition.

Not the Best For

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Male Pattern Hair Loss
Male Pattern Hair Loss
Limited evidence
Your own platelets, concentrated and injected into the scalp, usually three or four sessions and then top-ups. Studies suggest a modest improvement in density, but they are small and use different protocols, so it is hard to say who benefits and by how much. It is an add-on to minoxidil and finasteride, priced like a main treatment.
Alopecia Areata
Alopecia Areata
Limited evidence
Your own blood is spun down and the platelet-rich part injected into the patch. Small studies in alopecia areata have shown some regrowth, but they are few and short, and there is no agreed recipe or schedule. It is not covered by insurance and courses are expensive, so it is a reasonable thing to try after the better-tested options rather than instead of them.
Female Pattern Hair Loss
Female Pattern Hair Loss
Limited evidence
Your own blood is spun down and the platelet-rich portion injected into the thinning scalp, usually three or four sessions and then top-ups. Studies are small and the protocols vary widely, so the honest position is promising rather than proven. It is expensive, it needs repeating indefinitely, and it is an addition to minoxidil rather than a replacement for it.
Telogen Effluvium
Telogen Effluvium
Weak evidence
Injections of your own concentrated platelets into the scalp, marketed for every kind of hair loss. It has been studied mainly in pattern hair loss rather than in this, and a straightforward shed regrows on its own within the same months a course would run. It is several expensive sessions, so it is worth being clear about what you are buying before you start.

Pros and Cons

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Pros
  • It uses your own blood No drug, no daily routine, no hormonal effect.
  • It layers onto everything else It adds to minoxidil, finasteride or needling.
  • Almost no downtime A sore, tight scalp for a day, sometimes a headache.
  • An option when tablets are not One of the few left if you cannot take a pill.
Cons
  • The evidence is genuinely mixed Small, short trials, different recipes.
  • There is no standard recipe No two clinics prepare or inject it the same way.
  • It is not a cure Stop the sessions and the benefit fades over months.
  • The cost keeps coming Ongoing maintenance, and insurance calls it cosmetic.
  • It does nothing on a bare scalp Nothing left there to thicken.

How to Prepare

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A few days beforeThe day beforeThe morning of
Painkillers
A few days before
Many providers ask you to pause anti-inflammatory painkillers such as ibuprofen for several days, since they may blunt the signal PRP depends on. Ask what yours wants.
Alcohol
The day before
Skip alcohol.
Hair, water and gym
The morning of
Clean, dry hair, no styling product, dry shampoo or fiber powder. Eat and drink normally. No gym, sauna or swimming that day.
Ask your provider
Never stop a prescribed blood thinner or daily aspirin without asking the doctor who prescribed it.

What Happens

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ArrivingThe treatmentLeaving
Arriving
The scalp is examined, photos taken in a fixed position, and thinning areas marked. Ask for the photos if they are not offered — they are the only honest way to judge this later. Blood is drawn and spun. Numbing cream goes on 20 to 30 minutes before, with ice or a vibrating device at each injection. Some providers ring the scalp with local anesthetic instead. Your provider will ask about these things.
The treatment
The plasma layer is injected in a grid across the thinning area, just under the skin, over about 10 to 15 minutes. Some also run a microneedling pen over the area and press plasma in. The injections sting and pinch, worst along the hairline and crown. Most people call it uncomfortable rather than unbearable, and it is fair to ask for more numbing.
Leaving
The scalp is tender, slightly puffy, maybe with pinpoint spots of blood. It feels tight, like a ponytail worn too long. Most people go straight back to work.

Recovery

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Days 1 to 3Days 3 to 7Weeks 2 to 8
Days 1 to 3
Puffiness can move down to the forehead and eyelids over the first two or three days. It looks alarming and settles on its own. Sleeping with your head raised helps. A headache is common, and acetaminophen is usually fine — check whether your provider wants you to avoid ibuprofen.
Days 3 to 7
Tenderness fades, tiny scabs come away with washing, and the scalp feels like itself again.
Weeks 2 to 8
Some people shed a little more than usual for a few weeks after the first session. Unsettling, but not a sign of failure, and it settles.

Aftercare

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Next morning24 to 48 hoursA few days
Washing
Next morning
Leave the scalp alone until the next morning, then wash gently with lukewarm water. No scrubbing or hot water for 48 hours.
Exercise
24 to 48 hours
Sweat and blood flow into a freshly injected scalp make it sore.
Sun and heat
A few days
No sauna, hot tub, steam room or long sun exposure for a couple of days.
Topicals
Restart minoxidil and any medicated shampoo the next day unless told otherwise.
Painkillers
If you were asked to avoid ibuprofen and similar anti-inflammatories, that usually continues a few days afterward. Acetaminophen is the alternative.
Coloring
Wait about a week before dyeing or chemically treating your hair.

Risks

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Most problems with PRP are short-lived and predictable. Your own blood removes the risk of reacting to the material, but not the risk of a needle in a scalp.

Swelling that gets worse after day three
Some swelling in the first days is expected. Swelling that is increasing rather than settling is not.
Numbness or tingling that lasts
Small patches of altered sensation settle within days. Anything lasting beyond a few weeks should be looked at.
Shedding that carries on past two months
A short shed is normal. A prolonged one deserves a second look at the diagnosis, not another session.
No change at all after a full course
Common enough to plan for. It usually means reassessing what is causing the hair loss, not booking more PRP.

In Deeper Skin Tones

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PRP uses no light and no heat, so the main tone-related risk of most cosmetic procedures does not apply — no burns, and no bleaching or darkening from the treatment. Needle punctures can leave small dark spots for a few weeks in skin that marks easily, and those fade. If you form keloid or raised scars, mention it, though scalp keloids from a fine needle are rare.

The more important point is different. Hair loss in Black women is often not pattern hair loss at all. Traction alopecia, from years of tension on the hairline, and central centrifugal cicatricial alopecia, a scarring type that starts at the crown and destroys follicles as it spreads, are both common and both treated differently. In a scarring alopecia the follicle is replaced by scar tissue, and no injection brings it back. What matters is getting the inflammation under control early with prescription treatment, often with a scalp biopsy to confirm what is happening.

The evidence for PRP in scarring alopecias is thin, and using it first can waste the months that mattered most. Ask directly whether your hair loss is the scarring kind before agreeing to a package.

If You Stop

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Stopping does not cause a crash. The gains fade over several months as treated follicles drift back toward the size they were heading for anyway, and the underlying pattern loss continues at its own pace. No rebound, and no evidence you end up worse off than if you had never started. What people notice is ordinary thinning resuming, which feels like a loss because it is measured against the better result. If you stop PRP, keep the medical treatment going — that is the part holding the line.

Combining Treatments

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Same day
Hair loss medicines
Minoxidil, finasteride, dutasteride and spironolactone in women all continue.
Same day
Ketoconazole shampoo
Sits comfortably alongside PRP.
Same day
Low-level laser caps
These carry on alongside PRP.
Same day
Microneedling
Often done in the same visit, plasma applied to the needled scalp.
Same day
Blood tests
Check iron, thyroid and vitamin D — deficiency drives shedding.
Wait 1 week
Hair coloring
About a week either side of coloring or chemical straightening.
Different visit
Scalp steroid injections
Kept to separate visits from PRP.
Ask your doctor
Hair transplant
Some surgeons give PRP around surgery, but the evidence is limited.
Until healed
Scalp infection or flare
Not over an active infection, an inflamed flare or open skin.

Insurance Coverage

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Insurance almost never covers PRP for hair loss — it is classified as cosmetic and, for this use, is not an approved indication. Health savings accounts sometimes cover it, so check rather than assume.

Ask Your Doctor

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If you are pregnant or breastfeeding
Ask the doctor managing your pregnancy or breastfeeding first.
If you take a blood thinner or aspirin
Say so before booking. Never pause either on a clinic's advice without asking the doctor who prescribed it.
If you have a bleeding or platelet issue
PRP depends on your platelets, and some blood conditions make it unsuitable, including a low platelet count.
If you are anemic or have low iron
Worth correcting first. It causes shedding on its own.
If your scalp is infected or flaring
An active infection, an eczema or psoriasis flare, or open skin has to settle first.
If you have had keloid or raised scars
Mention it, even though scalp keloids from a fine needle are uncommon.
If you are being treated for cancer
Active cancer or chemotherapy means this needs the agreement of the team treating you.
If you have a scarring type of hair loss
Discuss whether controlling the inflammation comes first — the window for saving follicles is limited.
If you have not tried the medicines yet
Minoxidil and the prescription options are cheaper and better studied, and PRP works better on top of them.
If you faint at blood draws
Say so. It is easily managed if the clinic knows in advance.

At-Home Versions

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A plain white bottle with a gray applicator tip lying on its side, labeled Minoxidil
Topical minoxidil 5%
Good alternative
Applied daily to the scalp. Slower than people want but genuinely effective for pattern thinning, and the sensible thing to have in place before spending on PRP.
At-home microneedling, 0.5 to 1.0 mm
Okay alternative
The closest home version of the needling part of PRP, usually once a week, often combined with minoxidil. Keep the device clean, keep the depth low, and stop if the scalp stays sore.
Ketoconazole shampoo
Okay alternative
Helps if scalp inflammation or dandruff is part of the picture. It is supportive, not a hair loss treatment.
Exosome and peptide scalp serums
Okay alternative
Growth factor serums too. Marketed as PRP in a bottle. The molecules involved are large and the human data for hair are thin. Expensive for what is known.
Home PRP kits and centrifuges
Bad alternative
Sold online, with no evidence for safe home use. Do not. Drawing your own blood, handling it outside a clinical setting and injecting it into your scalp carries a real risk of infection with no offsetting benefit.

How It Compares

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A plain white bottle with a gray applicator tip lying on its side, labeled MinoxidilDiagram of a hair follicle in cross-section, labeled to show that minoxidil keeps the follicle in its growing phase for longer.
Topical minoxidil
Different job
Cheap, over the counter, and works on the same kind of thinning. It needs applying every day and takes months, but it is the treatment PRP is usually added to rather than compared against.
Finasteride or dutasteride
Different job
Blocks the hormone signal that drives pattern hair loss, so it slows the process itself rather than propping up the result. A daily tablet with a side effect profile that needs a proper conversation.
Low-dose oral minoxidil
Different job
Growing evidence. Increasingly used by dermatologists, mostly supported by large clinical series rather than big randomized trials. Cheap, and requires monitoring for fluid retention and heart rate.
MicroneedlingDiagram: how Microneedling works in the skin
Microneedling
Worse
Overlaps with part of what PRP may be doing, at a fraction of the cost, and can be done at home at low needle depths. Works best combined with minoxidil.
Low-level laser caps and combs
Different job
A device you use at home several times a week, with modest effects. No appointments, high upfront cost, no needles.
Hair transplantDiagram: how Hair Transplant works in the skin
Hair transplant
Different job
For the right candidate. The only option that puts hair where there is none, and it does not replace medical treatment either.
An amber prescription bottle lying on its side on a white background with a plain white label reading Spironolactone, and six small round white tablets spilled out in front of it.Diagram: how Spironolactone works in the skin
Spironolactone, for women
Different job
A tablet used for hormonal patterns of thinning, often alongside minoxidil, and not suitable for everyone.

Finding a Provider

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PRP for hair is offered by dermatologists, plastic surgeons, hair restoration clinics and plenty of med spas, and in many US states a nurse or physician assistant may do the injections under supervision. What matters more than the title is whether the person can tell you what kind of hair loss you have and why PRP suits it. Ask how the plasma is prepared, single or double spin, whether anything is added, how many sessions the plan includes, whether standardized baseline photographs are taken, and what happens if there is no change. Red flags: a guarantee of regrowth, pressure to buy a large package on the first visit, no baseline photographs, vagueness about the preparation, expensive add-on cocktails presented as standard, and no discussion of minoxidil or the prescription options.

Myths

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  • "PRP regrows hair on a bald scalp." It does not. PRP works on follicles that are still alive and getting finer. Where the scalp has been smooth and shiny for years the follicles are gone, and no injection recovers them. That area needs a transplant or nothing.
  • "It is a one-and-done fix." It is maintenance. The initial course is three or four sessions, and the benefit fades over months without repeats. Anyone calling it permanent is describing something else.
  • "It is your own blood, so there is no risk and it cannot fail." Your own blood removes the risk of reacting to a foreign material. It does not remove the risk of infection, bruising or swelling, and it says nothing about whether the treatment works.
  • "PRP is FDA approved for hair loss." The centrifuge systems have clearance as devices for preparing platelet-rich plasma. Treating hair loss with the result is off-label, at every clinic offering it.
  • "All PRP is the same, so price is the only difference." Preparation methods differ enough that platelet concentration can vary several-fold between clinics using the same word. A real reason results vary, and a fair thing to ask about.

Questions Patients Ask

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Does PRP actually work for hair loss?

For some people, yes, and the change is usually modest rather than dramatic. Most trials show more and thicker hairs compared with a placebo injection, but they are small, short, and use different preparations. Think of it as something that may improve a result you are already getting from medical treatment, not a treatment that stands on its own.

How long before I see anything?

Less shedding at two to three months, and a change in thickness at four to six months if it is going to happen. Photographs taken at the start are the only reliable way to judge it — gradual change in your own mirror is nearly impossible to see.

How often do I have to keep going?

Three or four sessions a month apart, then maintenance every three to six months. An ongoing commitment, not a course you finish.

Is it covered by insurance?

Almost never. It is treated as cosmetic for hair loss, and the preparation devices are cleared for making platelet-rich plasma rather than for treating hair, so this is off-label everywhere.

Does it work if the area is completely bald?

No. PRP thickens follicles that are still there and shrinking. Where the scalp has been smooth for years there is nothing left to work on, and a transplant is the only way to put hair there.

Does it hurt?

The injections sting, and the scalp is a sensitive place. Numbing cream, ice or a vibration device makes it manageable, and the injecting is over in about ten to fifteen minutes. Afterward the scalp feels bruised for a day.

References

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