Platelet-rich plasma (PRP) injection

Overview

PRP injection uses a concentrated portion of your own blood (platelets and growth factors) placed into a target tissue to support healing in selected tendon, ligament, or joint conditions. Evidence varies by condition.

Interventional pain procedures can reduce pain to create a “window” for movement, sleep, and rehabilitation. The best results usually come when the procedure is matched to the right diagnosis and followed by a structured plan.

Mechanism of action

Mechanism depends on the target tissues and the technique used. Your clinician should explain exactly what is being treated and how it relates to your symptoms.

• Blood is processed to concentrate platelets
• Platelets release growth factors that may influence healing response
• Best results usually require a structured loading and rehab plan

Conditions treated

These procedures are usually recommended when symptoms and examination suggest a specific pain generator that can be targeted safely.

• Selected tendinopathies
• Some mild-to-moderate osteoarthritis cases
• Soft tissue healing support in specific indications

What happens during the procedure

Most procedures are performed as an outpatient day case. Imaging guidance (such as ultrasound or X-ray) improves accuracy and safety.

Typical steps

• Consent and safety checks; confirm allergies and medications.
• Positioning and sterile skin preparation.
• Local anaesthetic to numb the skin and deeper tissues.
• Targeting with imaging guidance, then treatment delivery.
• Short observation period and discharge instructions.

Expected outcomes and how long relief lasts

Response varies by diagnosis, severity, and nervous system sensitivity. Your team will set goals in terms of function (walking, sleep, return to work) rather than pain score alone.

• Gradual symptom improvement over weeks to months
• Improved tissue load tolerance
• Reduced pain flare frequency with appropriate rehab

Typical duration of benefit: Varies; some people report months of benefit, especially when rehab is optimised.

Side effects, risks, and safety

Most side effects are temporary. Serious complications are uncommon when procedures are appropriately selected and performed with imaging guidance.

• Soreness at injection site
• Temporary pain flare
• Bruising
• Infection is rare

Seek urgent help for severe shortness of breath, chest pain, high fever, rapidly spreading redness, or new severe weakness.

Contraindications and when to avoid it

Your clinician should screen for factors that increase risk or reduce likely benefit.

• Active infection
• Blood disorders or anticoagulation considerations (case-dependent)
• Unclear diagnosis or unrealistic expectations
• Severe joint damage where other options may be more appropriate

How it compares with other options

Different procedures are suited to different pain generators. A “best” choice depends on the diagnosis and your goals.

• Compared with steroid injections: steroids can reduce inflammation quickly; PRP is often slower and condition-dependent
• Compared with exercise therapy: PRP is usually an adjunct, not a replacement
• Compared with surgery: PRP is less invasive but not appropriate for structural problems needing repair

Aftercare and rehabilitation integration

Aftercare is where results are protected. The aim is to increase safe activity while symptoms are calmer.

• Relative rest for 24–48 hours
• Avoid heavy load briefly, then follow a graded loading plan
• Schedule rehabilitation follow-up
• Track function changes rather than pain alone

Costs and insurance (general guidance)

Coverage varies. Ask what documentation is required and whether diagnostic blocks or conservative care are prerequisites.

• Coverage for PRP varies widely; some insurers consider it elective
• Ask about package costs and follow-up rehabilitation coverage

Patient story (composite example)

A person with chronic tendon pain had plateaued despite exercise progressions.

After PRP and an updated loading plan, symptoms improved gradually over the next months.

This is a de-identified composite example for education. Individual outcomes vary.

Next steps

Bring a medication list, relevant imaging reports, and a short symptom timeline to your consultation. Your clinician can confirm the target, explain realistic outcomes, and coordinate follow-up rehabilitation.

Medical disclaimer

This article is for general education only and is not medical advice. Procedures carry risks and should be chosen with a clinician who understands your medical history and examination findings.

FAQs

How long does PRP take to work?

It is usually gradual, often weeks to months, depending on the condition and rehab adherence.

Is PRP better than steroids?

They serve different goals. Steroids are often faster for inflammation; PRP may be helpful for selected tendon conditions.

Do I need imaging guidance?

Often yes, especially for tendon or joint targets, to improve accuracy.

Is PRP safe?

It uses your own blood, and serious complications are uncommon, but any injection carries risk.

How many injections are needed?

It depends on diagnosis and response. Some need one; others follow a series.

Should I stop NSAIDs?

Ask your clinician. Recommendations vary by protocol and target.

References

• NHS (UK) — Steroid injections
• AAOS OrthoInfo — Injections and procedures
• Cochrane — Evidence summaries
• NICE — Clinical guidance and evidence
• Mayo Clinic — Patient education