Plasma injection for tendonitis: what to know

The term usually refers to platelet-rich plasma, prepared from a small sample of your blood and placed near the affected tendon. The aim is to support a structured healing environment, but the response can differ with the tendon, the duration of symptoms, the underlying diagnosis, and the rehabilitation plan. Tendonitis is often used for tendon pain, although persistent tendon problems may involve degenerative changes rather than simple inflammation. A clinician should confirm the pain source and check for a partial tear, nerve problem, joint condition, or another explanation before discussing an injection.

Before treatment, share medicines, bleeding problems, allergies, infection, immune conditions, and previous injections. Ask what activity changes are expected immediately afterward and how the tendon will be loaded later. Temporary soreness can occur after an injection, so arrange practical support if movement is limited. Rehabilitation commonly progresses from comfortable mobility to controlled loading and strengthening. Physiotherapy may help set that progression. Shockwave therapy or strength training rehabilitation may be considered in selected cases, depending on the tendon and examination. Avoid returning to full sport simply because the skin puncture feels settled; tendon capacity takes longer to rebuild.

Contact the treating service promptly for increasing redness, warmth, drainage, fever, severe swelling, or pain that is rapidly worsening after the injection. Seek urgent care for breathing difficulty, facial swelling, fainting, or sudden loss of strength or function. Arrange review if tendon pain persists, a snap occurs, or you cannot follow the planned rehabilitation because symptoms are escalating.

What tendon problem is being treated, and how was it confirmed? What benefit is realistic for my situation? Which medicines should I pause or continue? What is the aftercare plan, and when can I start physiotherapy, strengthening, or sport?