Platelet-Rich Plasma (PRP) therapy involves injecting a concentrated solution of platelets derived from your own blood into an injured area to stimulate healing. For Achilles tendon issues, PRP aims to promote tissue repair and reduce pain by delivering growth factors directly to the damaged tendon. This article details the typical post-injection experience and the path toward regaining full function.
Immediately After the Injection
Following a PRP injection into the Achilles tendon, localized pain, soreness, and mild swelling at the injection site are common. These immediate reactions are a normal part of the healing process, as the injection initiates an inflammatory response to stimulate tissue repair. Bruising around the treated area may also occur, resolving within a few days. To manage discomfort during the first 24 to 72 hours, acetaminophen (Tylenol) is recommended.
It is important to avoid anti-inflammatory medications like ibuprofen or naproxen for at least two weeks post-injection, as these can interfere with the inflammatory process triggered by PRP. Rest and elevation of the affected leg are important during this initial period to minimize swelling and allow the platelets to begin their work. Limit physical activity and avoid strenuous exercise or heavy loading on the Achilles tendon for the first few days to protect the treated area.
Navigating the Recovery Period
As the first few days pass, the initial pain and swelling from the injection should gradually subside within a week to 10 days. During this phase, continue avoiding anti-inflammatory drugs and use acetaminophen for pain relief if needed. Gentle, non-weight-bearing movements may be introduced as tolerated, but high-impact activities should still be avoided for at least two weeks.
Activity modification is important during this period, and may include limiting weight-bearing or using crutches or a walking boot to protect the tendon, depending on the injury’s severity. Light, controlled movements, such as gentle stretching and range-of-motion exercises, can help prevent stiffness and promote mobility around days four to seven. Gradual reintroduction of light strengthening and cardiovascular exercises, like walking or easy cycling, can begin around days seven to fourteen, provided pain levels remain low. Adhering to specific post-injection instructions from your healthcare provider is essential to support healing.
When to Seek Medical Advice
While some discomfort and swelling are expected after a PRP injection, certain symptoms warrant immediate medical attention. Signs of infection, though rare, include increasing redness, warmth, pus, or drainage at the injection site, accompanied by fever or chills. These symptoms indicate a potential complication requiring prompt evaluation.
Severe or worsening pain not managed by prescribed methods, or pain that increases significantly after the initial few days, should also be reported to your doctor. New numbness or tingling, or any significant changes in sensation or function around the treated area, could suggest nerve irritation. Contacting your healthcare provider if these concerning symptoms arise ensures timely assessment and appropriate intervention.
The Path to Full Recovery
The journey to full recovery after an Achilles tendon PRP injection is a gradual process that can extend over several weeks to months. While some patients may notice improvements within 4 to 6 weeks, complete recovery, especially for chronic tendon damage, may take up to three to six months. The goal of this treatment is to restore normal function, reduce pain, and strengthen the Achilles tendon.
Progressive rehabilitation and physical therapy play an important role in achieving this outcome. Physical therapy often begins around two weeks post-procedure, focusing initially on protecting the healing area and restoring gentle range of motion. As healing progresses, exercises will emphasize strengthening the tendon through controlled loading, including eccentric training, and improving overall stability. Adherence to these rehabilitation protocols and attending all follow-up appointments are essential for maximizing the benefits of the PRP injection and ensuring a successful return to daily activities.