What to expect from PRP injection for hamstring strain

A hamstring strain affects the muscles at the back of the thigh and can involve pain, tenderness, bruising, or weakness. Before PRP, the clinician reviews the injury, examines the tendon or muscle area, and may use ultrasound to guide the injection. Blood is collected and processed so a platelet-rich portion can be placed near the injured tissue. The injection is one part of care; rehabilitation remains important for restoring strength, lengthening tolerance, coordination, and a safe return to activity. Suitability depends on the injury, symptoms, medicines, and health history.

Tell the clinician about blood thinners, bleeding problems, allergies, infection, and all medicines or supplements before the appointment. Follow instructions about eating, drinking, and medication changes; do not stop a prescribed medicine without medical advice. Plan for relative rest immediately afterwards and follow the staged exercise plan. Avoid testing the hamstring with sprinting or deep stretching simply because the injection has been given. Keep follow-up appointments so strength and loading can be progressed according to symptoms and examination.

Some local soreness can occur after an injection. Contact the clinic for increasing redness, warmth, drainage, fever, severe swelling, or pain that is escalating rather than settling. Seek urgent help for fainting, breathing difficulty, or signs of a serious allergic reaction. Sudden calf swelling or breathlessness also needs urgent assessment.

Ask what tissue is injured, why PRP is being considered, which medicines need review, when loading can restart, and what signs should prompt an earlier appointment.