PRP for hair: side effects, who should avoid it, and recovery

Platelet-rich plasma (PRP) is often described as "natural" because it is made from your own blood. That is true, and it is one reason the treatment is generally well tolerated. But PRP is still a medical procedure involving a blood draw and many small injections into the scalp. Knowing the usual side effects, the rare risks and who should avoid it helps you decide calmly and spot problems early.

This article covers what studies report about PRP safety for hair loss, the common short-term effects, rare complications, who should not have PRP or should check first, and what recovery usually looks like. It is general information, not personal medical advice.

Short answer

For most healthy adults, scalp PRP appears to have a favourable safety profile. A systematic review of 13 randomised trials found no serious treatment-related adverse events ¹, and another review of PRP for pattern hair loss reported no major or long-term side effects, with scalp pain the most common complaint ². According to the American Academy of Dermatology (AAD), the most common effects appear immediately and settle within about 24 hours: pain, swelling, bleeding, light-headedness or low blood pressure, and redness ³. People with low platelets or platelet disorders, infections, active scalp lesions, chronic liver disease or those on blood thinners are generally not ideal candidates ⁴. The main serious risks come from poor technique or handling of the blood sample, such as infection, so choose a registered doctor in a properly equipped clinic ⁵.

How PRP is done, and why that matters for safety

A small amount of blood is drawn from your arm, spun in a centrifuge to concentrate the platelets, and injected into thinning areas of the scalp with fine needles. Each step carries its own small risks:

• The blood draw can cause bruising or, in some people, fainting.
• Handling the sample must be sterile, and the clinic must make sure your own blood goes back into you. The AAD notes that the biggest risks come from how blood is handled: a non-sterile process could lead to infection, and receiving someone else's blood by mistake could make you very ill ⁵.
• The scalp injections cause pain, pinpoint bleeding and swelling, and in rare cases infection or other injury ⁴.

For a general overview of the treatment itself, see PRP for hair loss.

Common short-term side effects

Sources: ^{3 2 6}.

Pain

Pain is the most frequently reported side effect in the PRP literature ^{3 2}. In some trials almost every patient felt pain during injections, even with local anaesthetic, though it usually subsided within hours ². Pain can be reduced with numbing cream, local anaesthetic, vibration devices to distract from the needle, and ice afterwards ^{4 3}. If you are worried about pain, ask your clinic before booking what they use.

Light-headedness

Some people feel faint during the blood draw or injections. The AAD suggests arriving well hydrated and after a recent meal to reduce this ³. Tell staff straight away if you feel dizzy, sweaty or nauseous.

Shedding after PRP

Some people worry that PRP causes extra shedding. In trial summaries this is rarely reported; one trial noted that no participant reported increased shedding ². If you notice more hair fall after a session, take photos and mention it at your review. It may be unrelated, for example due to illness, stress or a change in medication.

Rare but important risks

Serious complications from scalp PRP are uncommon, but you should know about them:

• Infection at injection sites, especially if equipment or the sample is not handled in a sterile way ^{5 4}.
• Wrong-sample errors, which proper clinic procedures are designed to prevent ⁵.
• Unusual systemic reactions. A 2025 case report described a 22-year-old woman who developed vision problems about a month after scalp PRP, which fully recovered with steroid treatment; the authors suggested an inflammatory cause but could not prove PRP was responsible ⁷. This is a single case, not a common risk, but any change in vision after treatment should be checked promptly.

Severe allergic reactions are unlikely because PRP comes from your own blood, but some preparations include additives such as anticoagulants or activators. Tell your doctor about any allergies.

Who should avoid PRP or check with a doctor first

PRP depends on healthy platelets, and some conditions make it less safe or less likely to work. According to Ohio State dermatologists, people with the following are generally not ideal candidates ⁴:

• Low platelet counts
• Systemic conditions that affect platelet function
• Active infections
• Active skin lesions in the treatment area
• Chronic liver disease
• Use of blood thinners

The AAD also lists hepatitis C, HIV, blood cancers, cardiovascular disease requiring blood thinners, and skin cancer in the treatment area as reasons PRP is not recommended for cosmetic use ⁵.

Other situations to discuss with your doctor include pregnancy or breastfeeding, where data are limited; a history of keloids or poor wound healing; and scalp conditions such as active psoriasis or seborrhoeic dermatitis flares. Do not stop prescribed blood thinners on your own to have PRP. That decision belongs with the doctor who prescribed them.

Medicines and supplements

Tell your doctor everything you take, including supplements. Some, such as aspirin, NSAIDs (for example ibuprofen or naproxen), fish oil and certain herbal products, can affect bleeding or platelet function. Many doctors advise avoiding NSAIDs for a period before and after injections, and suggest ice or paracetamol for pain instead ⁴. Your doctor will tell you what to pause and for how long, if anything.

Keep using your usual hair loss treatments unless told otherwise. If you use topical minoxidil or other scalp products, ask whether to skip them on the day of treatment while the injection sites are fresh. See minoxidil.

Before your first session

A short checklist can make the day smoother: write down all your medicines and supplements, eat a light meal and drink water beforehand, wear a top that is easy to remove without touching your scalp, and arrange to rest for a while afterwards if you tend to feel faint with needles. Ask for written aftercare instructions and a contact number in case of problems.

Recovery: what to expect

Most people return to normal activities the same day. Typical advice includes:

• Same day: avoid washing your hair, heavy exercise, swimming and saunas; avoid touching or rubbing the treated area.
• Next day: gentle washing with a mild shampoo is usually fine.
• First few days: mild tenderness or small bruises may remain; avoid harsh chemical treatments such as colouring or rebonding until the scalp has settled, unless your doctor says otherwise.

Exact instructions vary between clinics; follow the ones given to you.

When to seek medical advice

Contact your doctor or seek care if you notice:

• Fever, or redness, warmth or swelling that spreads or worsens after the first day
• Pus or a painful lump at an injection site
• Pain that is getting worse rather than better
• Any vision change, severe headache or other new symptoms

If you have trouble breathing, swallowing or lose consciousness, seek emergency help immediately.

Is the benefit worth the risk?

Reviews suggest PRP can improve hair density in pattern hair loss compared with placebo, although results vary a lot and study quality is mixed ^{1 8}. Since the risks are mostly mild and short-lived, many people find it a reasonable option, especially alongside minoxidil ⁹. But it involves repeated sessions and costs. See how many PRP sessions you may need, PRP cost in Malaysia and PRP vs minoxidil.

Life in Malaysia

PRP is widely offered in Malaysian dermatology, aesthetic and hair clinics. Because it involves blood and injections, it should be performed by a registered medical practitioner in a licensed facility. Before booking, ask who will do the procedure, how the sample is labelled and handled, and what kit is used.

You can check whether a doctor is registered through the Malaysian Medical Council's online register ¹⁰. A clean, well-organised treatment room, a clear consent form and written aftercare instructions are good signs.

Practical tips for Malaysian conditions: go hydrated and after a meal, especially during hot weather or if you are fasting during Ramadan, when fainting is more likely; ask whether sessions can be planned outside fasting hours. After treatment, avoid the gym, outdoor sports and heavy sweating for the rest of the day.

Common myths

• "Because it is my own blood, nothing can go wrong." Pain, bruising and, rarely, infection can still happen ⁴.
• "PRP is too risky for anyone." For most healthy adults, side effects are mild and short-lived ¹.
• "Anyone can do PRP." Proper sterile handling and medical training matter ⁵.
• "Side effects mean it is working." Redness and pain are reactions to the injections, not signs of success.

Common mistakes

• Not mentioning blood thinners, supplements or medical conditions.
• Arriving dehydrated or hungry.
• Stopping prescribed medicines without advice.
• Ignoring signs of infection after treatment.
• Choosing a clinic only on price without asking about the doctor and process.

How a doctor assesses hair loss

A doctor will ask about when your hair loss began, family history, medical conditions, medicines and supplements, and recent stressors. They will examine the scalp, often with a trichoscope, to confirm the diagnosis and rule out conditions that need different treatment. Before PRP, they should also check for reasons it may not be suitable, such as bleeding problems or scalp infection, and may order blood tests. See what to expect at a first hair loss consultation.

Questions to ask your doctor

1. Am I a suitable candidate for PRP given my health and medicines?
2. Who will perform the procedure, and how is my sample handled and labelled?
3. What will you use to reduce pain?
4. Should I pause any medicines or supplements beforehand?
5. What side effects are common, and how long do they last?
6. What should I do and avoid after the session?
7. Which symptoms should make me contact the clinic?
8. How will progress be judged, so I know whether continuing is worthwhile?

Bottom line

PRP for hair is generally well tolerated: pain, redness, swelling and minor bleeding are common and short-lived, and serious problems are rare. The most important safety steps are choosing a qualified doctor, disclosing your health and medicines, following aftercare advice and seeking help early if something seems wrong. For a wider view of options, see the guide to hair loss treatment in Malaysia.

Frequently asked questions

Is PRP for hair safe?

For most healthy adults it appears to have a favourable safety profile. Reviews of trials did not find serious treatment-related adverse events, and the most common problem was pain during injection.

What are the common side effects of PRP?

Pain, redness, swelling, pinpoint bleeding, and sometimes light-headedness. These usually settle within about a day.

Does PRP hurt?

Many people find the scalp injections uncomfortable. Numbing cream, local anaesthetic, vibration devices or ice may help; ask what your clinic uses.

Who should not have PRP?

People with low platelets or platelet disorders, active infection or skin lesions on the scalp, chronic liver disease, blood cancers, or those on blood thinners are generally not ideal candidates. Discuss any medical condition with your doctor.

Can I take painkillers after PRP?

Many doctors advise avoiding NSAIDs such as ibuprofen around treatment and suggest paracetamol or ice instead. Follow your own doctor's advice.

Can PRP cause hair shedding?

Trials rarely report it. If you notice more shedding after sessions, take photos and tell your doctor so they can check for other causes.

What is the recovery after PRP?

Most people return to normal activities the same day. Doctors often suggest avoiding washing, heavy exercise and swimming for the rest of the day.

When should I seek help after PRP?

Seek medical advice if you have fever, spreading redness, pus, worsening pain, or any vision change, headache or other new symptoms.

Educational content. Not medical advice.