PRP therapy is widely regarded as a safe, minimally invasive treatment for hair loss. However, like any medical procedure, it carries certain risks and side effects that every patient should understand before starting. This guide explains the most common risks of PRP therapy, who is more likely to experience them, and how to reduce them with the right precautions.

Clinical PRP therapy preparation showing platelet-rich plasma centrifuge tubes and blood sample processing, highlighting the risks, safety considerations, and medical procedures involved in PRP treatment.

Is PRP Therapy Safe?

PRP therapy uses the patient’s own blood plasma, which significantly reduces the risk of allergic reactions or rejection. Most clinical studies and practitioners consider it a low-risk procedure when performed by a qualified professional. However, “low risk” does not mean “no risk.”

Common Side Effects of PRP Therapy

  • Scalp tenderness – mild soreness at injection sites, usually resolves within 24–48 hours
  • Redness and swelling – temporary inflammation after injections
  • Itching or mild irritation – normal post-treatment reaction
  • Bruising at the blood draw site – minor, fades quickly
  • Temporary hair shedding – some patients notice increased shedding in the first 2–3 weeks, which often precedes new growth
  • Mild headache – occasionally reported after scalp injections
Infographic explaining the risks of PRP therapy, comparing common side effects such as pain, bruising, swelling, and redness with rare complications including infection, allergic reactions, bleeding, and nerve injury.
Rare but Serious Risks

While uncommon, there are more serious risks associated with PRP therapy that patients should be aware of:

  • Infection at the injection site – rare when sterile technique is used
  • Nerve injury – extremely rare; risk increases with inexperienced practitioners
  • Calcification – in very rare cases, calcium deposits may form at injection sites
  • Scarring – unlikely with proper technique, but possible with repeated injections in the same area
  • Vascular injury – rare risk during scalp injections

Who Should Avoid PRP Therapy?

PRP therapy may not be suitable for everyone. Certain medical conditions and situations increase the risk of complications.

You may need to avoid PRP if you have:

  • Blood clotting disorders or are on blood thinners
  • Active scalp infection or skin condition at the treatment site
  • History of keloid scarring
  • Platelet dysfunction syndrome
  • Anaemia or very low haemoglobin levels
  • Active cancer or undergoing chemotherapy
  • Pregnancy (consult your doctor)
  • Severe systemic infections
How to Minimise the Risks of PRP Therapy

The majority of PRP risks can be significantly reduced with the right precautions.

Tips to include:

  1. Always choose a qualified and experienced medical professional
  2. Disclose all medications, supplements, and medical conditions before treatment
  3. Avoid alcohol and blood-thinning supplements (like fish oil or aspirin) for at least 48 hours before your session
  4. Follow all pre-treatment instructions provided by your clinic
  5. Do not wash or apply products to your scalp for several hours after treatment
  6. Attend all follow-up sessions as recommended
  7. Report any unusual pain, swelling, or discharge to your doctor immediately
PRP Risks vs. Benefits -Is It Worth It?

For most healthy patients experiencing early to moderate hair loss, the benefits of PRP therapy generally outweigh the risks. Side effects are typically mild and temporary, while the potential outcomes improved hair density, stronger follicles, and reduced shedding  can be significant.

Before and after hair density comparison infographic showing the potential effects of PRP therapy for hair restoration, with visible improvement in hair coverage and scalp density over time.

Risk level -> Low (when done by a professional)

Recovery time ->Minimal

Common side effects -> Temporary soreness, redness

Serious risks -> Rare

Suitable for most people ->Yes, with medical assessment

Conclusion

Understanding the risks of PRP therapy helps you make a more informed decision about your hair restoration journey. For most patients, PRP is a well-tolerated, effective option – but it works best when approached with the right expectations, proper preparation, and guidance from an experienced specialist.

Learn more about prp treatment -> Prp Treatment 

Frequently Asked Questions

1. What are the most common risks of PRP therapy?
The most common risks of PRP therapy include pain or soreness at the injection site, swelling, redness, and minor bruising. These side effects are usually temporary and resolve within a few days after the procedure.
2. Is there a risk of infection with PRP therapy?
Although PRP is derived from your own blood, there is still a small risk of infection at the injection site. Choosing a certified clinic that follows strict sterilisation protocols significantly reduces this risk.
3. Can PRP therapy cause an allergic reaction?
Since PRP is prepared from the patient's own blood, allergic reactions are extremely rare. However, if numbing agents or other additives are used during the procedure, a mild reaction is possible in sensitive individuals.
4. Is PRP therapy safe for everyone?
PRP therapy is not suitable for everyone. People with blood disorders, active infections, cancer, or those on blood-thinning medications may not be ideal candidates. Always consult a qualified doctor before undergoing PRP treatment.
5. Can PRP therapy cause nerve or tissue damage?
In rare cases, improper injection technique can cause nerve irritation or damage to surrounding tissue. This risk is minimised when the procedure is performed by a trained and experienced medical professional.
6. Are there any long-term risks associated with PRP therapy?
Long-term risks of PRP therapy are not yet fully established due to limited long-term studies. Some patients may experience no improvement or temporary worsening of symptoms. Ongoing research continues to evaluate its long-term safety profile.
7. Does PRP therapy carry a risk of scar tissue formation?
In very rare instances, repeated PRP injections in the same area may contribute to localised tissue changes. However, when administered correctly, PRP generally promotes natural healing rather than scar formation.
8. Can PRP therapy worsen hair loss instead of improving it?
In some cases, patients may experience a temporary shedding phase after PRP scalp injections. This is usually short-lived and part of the natural hair growth cycle being reset. Significant worsening of hair loss due to PRP is uncommon.
9. How can I reduce the risks of PRP therapy?
To minimise risks, always choose a certified and experienced medical provider, disclose your full medical history, follow pre and post-procedure care instructions, and avoid self-administering or seeking treatment from unqualified practitioners.
10. Is PRP therapy approved and regulated for safety?
PRP therapy is considered a medical procedure and is regulated in most countries. While the FDA has not fully approved PRP for all uses, it is widely practised under medical supervision. Always verify that your provider follows recognised safety and hygiene standards.