Does PRP Hurt? What to Expect for Pain and Recovery After Injections

By Dr. Jeffrey Peng, MD · Updated August 2026

Watch the Full Video

https://youtu.be/ekvEYZY7cdM

One of the most common questions I hear when patients consider platelet-rich plasma is simple: do PRP injections hurt? Most people picture another quick office shot. That is often true while I am injecting. The surprise comes a few hours later, after the local anesthetic wears off, and it can catch people completely off guard.

In my practice I have helped thousands of patients through PRP injections and other orthobiologic treatments. Post-injection pain is consistently the part that surprises people the most. Here is what PRP feels like during the procedure and in the days and weeks that follow, plus the recovery protocol I give every patient.

What Does the PRP Procedure Feel Like?

When people hear “injection” and “platelet-rich plasma,” they often imagine something intense. The reality is more manageable than most expect. We start with a standard blood draw — the same sensation as any routine blood test. Your blood is then processed in a centrifuge to concentrate the platelets, which takes about twenty to thirty minutes.

Once the PRP is ready, I prepare the treatment area and apply a small amount of local anesthetic to numb the skin and underlying tissues. That significantly reduces discomfort during the injection itself. You may feel pressure or a dull ache, especially when I treat a deeper tendon or joint, but it is not the sharp sting people often fear. Most patients describe pressure, tightness, or a deep squeeze rather than actual pain. The injection itself usually lasts only a few seconds to a minute or two, depending on the area.

Why Does PRP Hurt After the Injection?

The part most people do not expect is what happens a few hours later. Once the local anesthetic wears off, the pain can ramp up — and for some patients it becomes quite intense. That is the number one source of anxiety I hear in follow-up conversations.

Here is what most people do not realize: this post-injection pain is not a sign that something went wrong. It is a sign that PRP is doing what it is supposed to do. Unlike cortisone, which suppresses inflammation for fast but temporary relief, PRP takes the opposite approach. It kickstarts your body’s natural healing process, and the first step in that process is inflammation.

Research supports that mechanism. A study in The American Journal of Sports Medicine showed that PRP activates proinflammatory signaling pathways — specifically TNFα and NF-κB — in tendon fibroblasts, triggering a transient inflammatory event that initiates tissue regeneration (Hudgens et al., 2016). When I inject PRP, the concentrated platelets release growth factors that signal the immune system, increase blood flow, and set off an inflammatory cascade. That is what causes the pain, swelling, and stiffness you may feel in the first few days. Uncomfortable as it is, that early inflammation is necessary for longer-term healing.

How Long Does PRP Pain Last? Tendons vs. Joints

How long that inflammatory phase lasts depends on whether the PRP went into a tendon or a joint. That distinction helps set realistic expectations.

For tendon injections — such as the rotator cuff, Achilles tendon, or lateral epicondyle (tennis elbow) — the inflammatory phase can last up to two full weeks. Soreness, stiffness, and sensitivity are normal. That discomfort is not a setback; it reflects your body breaking down damaged tissue and beginning repair. Tendons have relatively poor blood supply and heal slowly, so most patients will not feel meaningful improvement until about six to eight weeks after the injection, and for some it may take up to ten weeks. A review in Experimental and Therapeutic Medicine found that PRP promotes tendon healing through neovascularization, cell proliferation, and extracellular matrix reorganization — a process that needs time and an intact inflammatory response (Liu et al., 2021).

For joint injections — particularly for knee osteoarthritis — the inflammatory response tends to settle faster. Most patients find that pain and swelling improve within about a week, and range of motion starts to return. Joints also tend to respond sooner. Many patients notice less stiffness and better mobility by weeks three to four. A systematic review and meta-analysis of 18 randomized controlled trials found that PRP provided significantly better outcomes for knee osteoarthritis compared with hyaluronic acid, with a mean improvement of 44.7% on the WOMAC scale versus 12.6% for HA (Belk et al., 2021). A separate meta-analysis of 14 randomized controlled trials showed that PRP significantly reduced pain and improved physical function at three, six, and twelve months, without increasing the risk of post-injection adverse events (Shen et al., 2017).

PRP Recovery Protocol: A Phase-by-Phase Guide

The real challenge is that many people never reach the longer-term relief because the early pain can be intense. Without clear guidance it is easy to panic, do the wrong things, or give up too soon. Below is the protocol I provide after a PRP injection.

Phase 1: Days 0–3 (Protection)

The goal for the first three days is protection. This is when the inflammatory response needs to start, so it is critical not to interfere with it. Avoid anti-inflammatory medications such as ibuprofen, naproxen, and aspirin. Do not apply ice. Avoid aggressive soft-tissue work such as deep massage or foam rolling on the treated area. Skip exercise and repetitive movement that loads the injected area. Instead, apply heat a few times per day and give your body space to begin healing.

Phase 2: Days 4–14 (Gentle Movement)

Starting on day four, you can begin to reintroduce gentle movement. Start with light daily stretching and easy aerobic activity such as walking. By day seven, add light strengthening about three times per week. Keep avoiding anti-inflammatory medications, and keep any soft-tissue work controlled and minimal. Think of this phase as easing back into activity while still respecting the healing process.

Phase 3: Weeks 3–6 (Progressive Strengthening)

By this stage the inflammation has mostly settled, and the focus shifts to rebuilding strength and endurance. Progress both aerobic and strengthening work, ideally three times per week. If possible, continue to avoid anti-inflammatory medications so you do not blunt ongoing repair. I typically recommend a follow-up visit between weeks four and eight to check progress and fine-tune rehabilitation.

These restrictions apply to the body part that was treated. If you had PRP in your right shoulder, that shoulder needs protection — you can still walk, bike, and train your lower body. If the injection was in your left knee, you can do upper-body strength work as long as you are not loading that knee.

What to Avoid After a PRP Injection

In the first two weeks, avoid NSAID medications such as ibuprofen, naproxen, and aspirin. Those medicines block inflammation — and inflammation is part of how PRP is intended to work. Suppressing it can blunt the healing response and may reduce the effectiveness of treatment. If pain is hard to manage, acetaminophen (Tylenol) is the option I use.

Another common mistake is icing after PRP. Ice can feel like the obvious choice for swelling, but it reduces inflammation, and with PRP that inflammatory response is part of the mechanism. I prefer heat. A warm compress or heating pad can improve blood flow, relax surrounding muscle, and feel more soothing.

As the pain eases — typically after a few days — gentle movement is encouraged. Light range-of-motion work and basic stretching can help maintain flexibility and limit stiffness, as long as they do not aggravate symptoms. Listen to your body, respect the flare, and move mindfully.

The Bottom Line

PRP injections are generally well tolerated during the procedure itself, but the post-injection inflammatory response can be surprisingly intense. Understanding that this pain is part of the healing process — not a complication — helps you stay on track. Protect the area early, gradually reintroduce movement, and avoid NSAIDs and ice so PRP has the best chance to deliver the longer-term relief it is designed to provide.

If you are considering PRP, you can learn more about PRP injections on my website or schedule a consultation to discuss whether this treatment is appropriate for your condition.

---

References

1. Hudgens JL, et al. Platelet-Rich Plasma Activates Proinflammatory Signaling Pathways and Induces Oxidative Stress in Tendon Fibroblasts. Am J Sports Med. 2016;44(8):1931-1940. doi:10.1177/0363546516637176

2. Liu X, et al. Effects of leukocyte- and platelet-rich plasma on tendon disorders based on in vivo and in vitro studies. Exp Ther Med. 2021;21(6):639. doi:10.3892/etm.2021.10071

3. Belk JW, et al. Platelet-Rich Plasma Versus Hyaluronic Acid for Knee Osteoarthritis: A Systematic Review and Meta-analysis of Randomized Controlled Trials. Am J Sports Med. 2021;49(1):249-260. doi:10.1177/0363546520909397

4. Shen L, et al. The temporal effect of platelet-rich plasma on pain and physical function in the treatment of knee osteoarthritis: systematic review and meta-analysis of randomized controlled trials. J Orthop Surg Res. 2017;12(1):16. doi:10.1186/s13018-017-0521-3

5. Hong M, et al. Efficacy and Safety of Intra-Articular Platelet-Rich Plasma in Osteoarthritis Knee: A Systematic Review and Meta-Analysis. Biomed Res Int. 2021;2021:2191926. doi:10.1155/2021/2191926

---

Medical Disclaimer: This content is for educational purposes only and does not substitute for the medical advice of a physician. Always seek the advice of your physician with any questions you may have regarding your health or a medical condition.