PRP Side Effects: Is Platelet-Rich Plasma Treatment Safe? (Complete 2026 Safety Guide)

Safety is the first question any responsible patient should ask before undergoing a medical treatment. With PRP therapy growing rapidly in popularity across hair restoration, facial rejuvenation, and joint treatment, understanding its safety profile is essential for informed decision-making.

The short answer: PRP is one of the safest regenerative treatments available in medicine. A 2025 meta-analysis of 43 randomised controlled trials involving 1,877 participants confirmed that PRP's side effects are mild, temporary, and self-resolving. Because PRP is autologous (prepared entirely from your own blood), the risks that accompany synthetic products, foreign substances, and pharmaceutical medications simply do not apply.

This guide covers every known side effect, who should and should not receive PRP, and how the safety profile compares to alternative treatments.

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Common PRP Side Effects: What to Expect

The following side effects are reported in clinical literature and are consistent with what our patients experience at The London PRP Clinic. All are mild and temporary.

Redness at the treatment site. The most common side effect across all PRP applications. Appears immediately after treatment and resembles a mild sunburn. Resolves within 24 to 48 hours for most patients. Slightly longer (2 to 3 days) after facial PRP with microneedling due to the additional micro-injury component.

Mild swelling. Particularly common after facial PRP, under-eye PRP, and joint injections. Typically resolves within 24 to 72 hours. Cold compresses can help reduce swelling. Under-eye swelling may persist slightly longer (2 to 5 days) due to the delicacy of periorbital tissue.

Sensitivity or tenderness. The injection or microneedling sites may feel tender to the touch for 24 to 48 hours. This is a normal inflammatory response that is actually part of the treatment's mechanism of action. Over-the-counter paracetamol can be taken if needed (avoid ibuprofen and aspirin as they may interfere with the platelet response).

Minor bruising. Occasional and typically small. More common in patients who take supplements or medications that affect blood clotting (fish oil, vitamin E, aspirin). Resolves within 5 to 7 days.

Scalp sensitivity after hair PRP. Reported in approximately 15% of hair PRP patients. A feeling of tightness or mild discomfort across the scalp that resolves within 24 to 48 hours.

Minor headache. Reported in less than 10% of hair PRP patients. Typically mild and resolves within a few hours. Paracetamol is appropriate if needed.

Temporary shedding (hair PRP only). Some patients notice increased hair shedding 2 to 4 weeks after treatment. This is not a negative outcome. It indicates dormant follicles have been stimulated into a new growth cycle, pushing out old, weak hairs. The shedding is temporary (1 to 2 weeks) and is followed by thicker, healthier regrowth.

What PRP Does NOT Cause

Understanding what PRP cannot cause is equally important, particularly when comparing it to alternative treatments.

No allergic reactions. Because PRP is made entirely from your own blood, there is no foreign substance to trigger an immune response. This is one of the fundamental safety advantages of autologous therapy.

No disease transmission risk. Your blood is drawn, processed, and reinjected in a closed system during a single appointment. There is no pooled donor material and no risk of bloodborne pathogen transmission.

No vascular occlusion risk. Unlike dermal fillers (which carry a rare but serious risk of blocking blood vessels when injected near the eyes or nose), PRP contains no gel or filler material that can compress vessels.

No hyperpigmentation risk. Unlike laser treatments (which can cause post-inflammatory hyperpigmentation, particularly in darker skin tones), PRP stimulates natural biological processes without thermal tissue damage.

No systemic side effects. Unlike oral medications such as finasteride (which can affect libido in 1 to 2% of men) or spironolactone (which can cause electrolyte changes), PRP acts locally at the treatment site without entering the systemic circulation in therapeutically significant concentrations.

No dependency or withdrawal effects. Stopping PRP treatment does not cause accelerated hair loss or skin deterioration. Results gradually diminish over 12 to 18 months as the growth factor stimulus depletes, returning you to your natural baseline.

Who Should Not Have PRP

While PRP is safe for the vast majority of patients, certain conditions may make it inappropriate.

Active blood disorders or clotting conditions such as thrombocytopenia (low platelet count), platelet dysfunction syndromes, or haemophilia. PRP relies on adequate platelet function to be effective.

Anticoagulant therapy. Patients taking blood-thinning medications (warfarin, heparin, direct oral anticoagulants) may need to discuss timing of treatment with their prescribing doctor. In some cases, PRP can still be administered with appropriate precautions.

Active infection at the treatment site. Any active skin infection, wound, or inflammatory condition at the intended treatment area should be resolved before PRP is administered.

Active cancer or chemotherapy. PRP's growth-factor-stimulating properties make it inappropriate during active cancer treatment. Patients in remission should discuss PRP with their oncologist.

Pregnancy. While PRP uses your own blood, it is generally recommended to defer elective treatments during pregnancy as a precautionary measure.

Breastfeeding is NOT a contraindication. PRP is safe during breastfeeding because no systemic medications are involved.

Your GMC-registered doctor at The London PRP Clinic will review your full medical history during your consultation and advise on suitability.

How to Minimise Side Effects

Before treatment: Avoid blood-thinning supplements (fish oil, vitamin E, ginkgo biloba) for 48 hours if medically safe. Stay well hydrated. Eat a nutritious meal beforehand. Arrive with clean skin or hair (no products).

After treatment (hair PRP): Avoid washing hair for 24 hours. Avoid strenuous exercise for 24 to 48 hours. Avoid direct sun exposure on the scalp for 48 hours.

After treatment (facial PRP): Avoid makeup for 24 hours. Apply SPF 30+ daily. Avoid saunas, steam rooms, and intense exercise for 24 to 48 hours. Avoid anti-inflammatory medications for 24 to 48 hours (they may interfere with the healing response).

After treatment (joint PRP): Avoid heavy loading of the treated joint for 2 weeks. Gentle movement is encouraged. Ice the area if swelling occurs.

Safety at The London PRP Clinic by The Wellness

GMC-registered doctors perform every treatment, ensuring proper medical oversight, sterile technique, and the ability to manage any adverse response.

Medical-grade equipment and closed-system PRP preparation eliminate contamination risk.

Comprehensive pre-treatment assessment identifies contraindications before treatment begins.

No serious adverse events across thousands of treatments performed.

187+ five-star reviews. PRP from £545/session (hair) or from £395/session (face). Marylebone and Canary Wharf locations.

Book your consultation > WhatsApp | Email: team@thewellnesslondon.com | Call: +44 20 3951 3429

Medical Disclaimer: This article is for informational purposes only. Always disclose your full medical history to your treating doctor. All treatments at The London PRP Clinic are performed by GMC-registered doctors. Last reviewed March 2026.