Platelet-rich plasma (PRP) therapy is a regenerative treatment that uses your own blood to accelerate healing. A small sample of blood is drawn from your arm, placed in a centrifuge to separate and concentrate the platelets (which contain growth factors), and the resulting platelet-rich solution is injected directly into the injured tissue under ultrasound guidance. Your platelets contain growth factors including platelet-derived growth factor (PDGF), transforming growth factor-beta (TGF-β), and vascular endothelial growth factor (VEGF) that stimulate cell proliferation, tissue repair, and new blood vessel formation. A 2025 Hematology systematic review of 153 research articles confirmed that PRP’s active components regulate fibroblasts, endothelial cells, and immune cells through PI3K/Akt and MAPK/ERK signaling pathways — the same pathways your body uses naturally to heal injuries, but supercharged with platelet concentrations over 500% higher than normal blood. A 2023 PMC comprehensive review confirmed level I evidence supporting PRP’s efficacy in osteoarthritis, lateral epicondylitis (tennis elbow), bursitis, compressive neuropathy, plantar fasciitis, muscular injuries, and osteochondral lesions. In Tigard, Oregon, Active Pain Relief & Wellness offers ultrasound-guided PRP injections for musculoskeletal conditions.
What Conditions Does PRP Treat?
PRP therapy has been studied and used clinically for a wide range of conditions, with the strongest evidence in musculoskeletal applications. A 2025 World Journal of Orthopedics review of recent advances confirmed that PRP has demonstrated efficacy in knee osteoarthritis, rotator cuff tendinopathy, and lateral epicondylitis, often showing superior long-term benefits compared to conventional treatments. The American Medical Society for Sports Medicine consensus statement confirmed that PRP injections are more effective in reducing pain and improving function than steroid or hyaluronic acid injections for knee osteoarthritis, particularly in younger patients with mild to moderate disease. PRP has also been successfully used for Achilles tendonitis, plantar fasciitis, hip bursitis, partial tendon tears, muscle strains, ligament injuries, and chronic wounds.
Beyond musculoskeletal conditions, PRP is used in dermatology (hair loss treatment, skin rejuvenation, scar treatment), dental and oral surgery, chronic wound healing (diabetic foot ulcers, venous leg ulcers), and emerging applications in gynecology and urology. The 2023 PMC review noted that PRP now spans orthopedics, regenerative medicine, maxillofacial surgery, plastic surgery, and esthetics. For musculoskeletal conditions specifically, PRP is most effective for injuries that have failed to heal despite traditional conservative treatment (physical therapy, rest, medications, cortisone injections) and for chronic degenerative conditions like mild to moderate osteoarthritis. It is important to understand that PRP does not cure osteoarthritis or regenerate normal cartilage — it significantly alleviates symptoms, reduces inflammation, and may slow disease progression. Patients in Tigard, Oregon receive a thorough evaluation to determine if their condition is appropriate for PRP. For a detailed guide on knee-specific applications, see our post on PRP injections for knee pain.
PRP Conditions and Evidence Levels
| Condition | Evidence Level | PRP vs. Comparator | Typical Protocol |
|---|---|---|---|
| Knee Osteoarthritis (Mild-Moderate) | Level I (multiple RCTs) | Superior to hyaluronic acid and cortisone at 6–12 months | 3 injections, 4–6 weeks apart |
| Lateral Epicondylitis (Tennis Elbow) | Level I (multiple RCTs) | Positive response in RCTs (AMSSM consensus) | 1–2 injections |
| Plantar Fasciitis | Level I (systematic reviews) | More effective than cortisone at mid-term follow-up | 1–3 injections |
| Rotator Cuff Tendinopathy / Partial Tears | Level I (limited RCTs) | Similar to cortisone short-term; better long-term | 1–2 injections |
| Achilles Tendonitis | Moderate (conflicting evidence) | Positive results in some RCTs | 1–2 injections |
| Osteochondral Lesions | Moderate (SR + RCT) | PRP + microfracture superior to surgery alone | 1–3 injections |
| Hair Loss (Androgenic Alopecia) | Moderate (multiple studies) | Effective for hair density and thickness | 3–4 sessions, 4–6 weeks apart |
Sources: PMC 2023 comprehensive review (level I evidence for OA, epicondylitis, plantar fasciitis, muscular injuries); PMC 2025 narrative review of knee OA (40 high-quality studies, 2013–2025); World Journal of Orthopedics 2025; American Medical Society for Sports Medicine consensus statement; AMSSM technology overview; PRP systematic review 2024 (75 RCTs, 5,726 patients).
Who Cannot Do PRP Treatment?
PRP is made from your own blood, so allergic reactions are virtually nonexistent. However, several conditions can disqualify patients from PRP therapy or require careful evaluation. Absolute contraindications include active cancer or malignancy (growth factors in PRP could theoretically stimulate tumor growth), active infection at the injection site or systemic infection (sepsis), platelet disorders or blood diseases such as thrombocytopenia (abnormally low platelet count), critical thrombocythemia, or platelet dysfunction syndromes, and hemodynamic instability or severe anemia (not enough blood to draw safely). Patients on antiplatelet medications like clopidogrel (Plavix), ticagrelor (Brillinta), or prasugrel (Effient) are generally not candidates unless these medications can be safely stopped, because these drugs directly impair platelet function and would render the PRP ineffective.
Relative contraindications that require case-by-case evaluation include patients on blood thinners like warfarin, apixaban (Eliquis), or rivaroxaban (Xarelto) — these increase bleeding risk but do not impair platelet function directly, so PRP may be possible with careful coordination with the prescribing physician. Patients taking daily NSAIDs (ibuprofen, naproxen, celecoxib) for chronic conditions like rheumatoid arthritis may have impaired platelet function. A 2024 PRP quality review (75 RCTs, 5,726 patients) found a strong positive correlation (r = 0.79) between proper preparation protocols and PRP efficacy, emphasizing that medication management before treatment is critical to outcomes. Patients of all ages can receive PRP — studies in knee osteoarthritis include patients with mean ages in the 60s and older. Patients in Tigard, Oregon receive a complete medication and medical history review before PRP.
What Is the Downside of PRP?
PRP is one of the safest injection therapies available because it uses your own blood, eliminating the risk of allergic reactions or disease transmission. However, there are legitimate downsides to consider. The most significant is cost — PRP is typically not covered by insurance. Medicare considers PRP experimental for musculoskeletal conditions (it only covers PRP for chronic non-healing diabetic wounds enrolled in clinical trials). Most commercial insurance plans also do not cover it. The American Academy of Orthopaedic Surgeons confirms that very few insurance plans provide reimbursement for PRP. Out-of-pocket costs range from $500 to $2,000 per injection depending on the area treated and geographic location, with an average of approximately $900 to $1,000 per treatment.
Other downsides include post-injection pain and soreness. The injection intentionally creates an inflammatory response (that is how it works), and this inflammation can be quite uncomfortable for 2 to 5 days after treatment. Patients cannot take NSAIDs (ibuprofen, naproxen, aspirin) afterward because these would suppress the very inflammation PRP is designed to create — only acetaminophen (Tylenol) is permitted for pain. Results are not immediate — the healing process takes 6 to 8 weeks to assess initial response, and full recovery may take 3 to 6 months. Multiple injections may be needed (typically 1 to 3 for musculoskeletal conditions). Evidence quality varies by condition — while knee OA and tennis elbow have strong evidence, other conditions have more limited or conflicting data. Finally, PRP is not a cure for advanced arthritis or complete tendon ruptures — it works best for mild to moderate disease and partial injuries. Patients in Tigard, Oregon receive realistic expectations about outcomes and timeline at Active Pain Relief & Wellness.
How Much Does PRP Injection Cost?
PRP injection costs vary based on the body part treated, geographic location, provider experience, and preparation method. Based on current pricing data, a single PRP injection typically costs $500 to $2,000. A 2024 nationwide utilization study estimated annual PRP treatment costs of approximately $712 for ankle injections and $1,712 for hip injections. Most orthopedic and sports medicine practices charge $800 to $1,200 per injection for joint and tendon treatments. Hair restoration PRP typically costs $900 for a single treatment or $2,500 for a set of three treatments.
Because most insurance plans do not cover PRP, patients pay out of pocket. Some practices offer package pricing for the typical 3-injection series (for example, $2,400 to $3,000 for three knee OA treatments rather than $1,000 each). When evaluating cost-effectiveness, consider that PRP may delay or prevent more expensive interventions: a total knee replacement costs $30,000 to $50,000, cortisone injections provide only temporary relief and may weaken tissue with repeated use, and physical therapy alone often produces limited results for advanced conditions. Patients in Tigard, Oregon receive transparent pricing for PRP injections at their consultation at Active Pain Relief & Wellness.
How Long Do PRP Results Last?
PRP results typically last 6 to 12 months, though duration varies significantly based on the condition treated, disease severity, and individual healing response. WebMD reports that PRP continues working in the body for 6 to 9 months. For knee osteoarthritis, a 2025 PMC narrative review of 40 high-quality studies found that PRP injections (particularly leukocyte-poor formulations) demonstrate superior pain relief compared to hyaluronic acid and corticosteroids at 6 to 12 months, especially in patients with Kellgren-Lawrence grades I to III (mild to moderate). By one year, some patients experience symptom recurrence as the underlying disease progresses, suggesting PRP may need to be repeated.
The Washington University PRP protocol describes the healing timeline as follows: the inflammatory phase occurs in the first 7 days (increased pain and soreness is expected and normal), proliferative healing occurs during weeks 2 to 6 (gradual improvement begins), and remodeling continues for 3 to 6 months (full benefit realized). At 3 weeks, things should feel different — still sore but improving. At 6 weeks, if there has been no meaningful improvement, PRP may not have been effective for that particular condition. Most practices consider PRP treatments repeatable — patients can return for additional treatments every 6 to 12 months as needed. Tendon injuries typically require longer recovery than joint injections. Patients in Tigard, Oregon receive follow-up assessments at 6 weeks and 3 months post-injection.
What Are the Signs That PRP Is Working?
The signs that PRP is working follow a predictable timeline, and patients should be aware that initial worsening is actually a positive sign. During the first 3 to 7 days, increased pain, swelling, and inflammation at the injection site are expected and indicate the treatment is creating the intended inflammatory cascade. During weeks 1 to 3, the acute inflammatory response subsides and you may notice the pain gradually shifting from sharp injection-site soreness to a duller, more diffuse sensation — this indicates the healing process is underway. At 3 to 4 weeks, patients typically notice the treated area feels “different” — still not perfect, but the quality of pain changes and there are more good days than bad.
At 6 to 8 weeks, meaningful improvement in function becomes apparent — increased range of motion, less pain with activity, less stiffness in the morning, and ability to perform activities that were previously painful. At 3 to 6 months, maximum benefit is typically reached — reduced pain at rest and with activity, improved strength and function, and less need for pain medication. Signs that PRP may not be working include no change whatsoever in symptoms by 6 weeks, worsening symptoms beyond the initial inflammatory phase (past 2 weeks), or a return to baseline pain levels after initial improvement. If PRP has not produced meaningful benefit by 6 to 8 weeks, alternative treatments should be discussed. Patients in Tigard, Oregon receive follow-up evaluations to track progress.
What To Avoid After PRP Injection
Post-PRP instructions are critical to optimizing outcomes, because many common pain-relief habits can actually undermine the treatment. The most important restriction is avoiding all NSAID medications for at least 2 weeks after the injection, and ideally up to 6 weeks. This includes ibuprofen (Motrin, Advil), naproxen (Aleve), aspirin, diclofenac (Voltaren), meloxicam (Mobic), and celecoxib (Celebrex). A study found that NSAIDs taken after PRP injection resulted in significantly worse outcomes compared to no NSAIDs. Acetaminophen (Tylenol) is safe because it works through a different mechanism that does not affect platelet function.
Additional restrictions include avoiding ice on the injection site for the first 48 to 72 hours (ice suppresses the inflammatory response that PRP needs to work — some protocols recommend no ice/heat for the first 48 hours to preserve the inflammatory window), avoiding strenuous activity and heavy exercise at the treated site for 2 weeks (gentle mobility and stretching can begin at days 2 to 7), avoiding alcohol for 48 hours before and after treatment (alcohol impairs healing), no swimming, bathing, or hot tubs for 48 hours (shower is fine), and avoiding cortisone/steroid injections into the same joint for several weeks before and after PRP (corticosteroids suppress the immune response PRP relies on). Blood thinners like aspirin can typically be resumed 24 hours after the procedure if used for cardiac reasons. Patients in Tigard, Oregon receive detailed written post-procedure instructions.
What Vitamins Should I Take for PRP?
While no specific vitamin regimen is required for PRP, certain nutrients support the healing processes that PRP initiates. Vitamin C is essential for collagen synthesis, which is critical for tendon, ligament, and cartilage repair — adequate intake (at least 500 mg daily) supports the tissue remodeling phase. Vitamin D supports bone health and immune function, and deficiency (common in the Pacific Northwest including Tigard, Oregon) can impair healing. Ensuring a level of at least 30 ng/mL before PRP is reasonable. Zinc supports wound healing and immune function. Protein (at least 0.8 to 1.0 grams per kilogram daily, and ideally higher during recovery) provides the amino acid building blocks for tissue repair.
Importantly, some common supplements should be used with caution around PRP. Fish oil (omega-3 fatty acids) has mild antiplatelet effects and some providers recommend pausing it 7 to 10 days before PRP, though evidence on clinical significance is mixed. Turmeric and curcumin have anti-inflammatory properties that could theoretically blunt PRP’s inflammatory mechanism, though clinical data is limited. Glucosamine, chondroitin, boswellia, and collagen supplements are generally considered safe to continue. Always discuss your supplement regimen with your provider before PRP. Patients in Tigard, Oregon receive pre-procedure nutritional guidance.
What Medications Interfere With PRP?
Medications that interfere with PRP fall into two categories: those that impair platelet function (reducing PRP effectiveness) and those that increase bleeding risk (making the procedure riskier). Medications that impair platelet function and should be stopped before PRP (with provider approval) include all NSAIDs (ibuprofen, naproxen, aspirin, diclofenac, meloxicam, celecoxib — stop 5 to 7 days before), antiplatelet drugs (clopidogrel/Plavix, ticagrelor/Brillinta, prasugrel/Effient — these may be absolute contraindications depending on why they are prescribed), and corticosteroids (oral prednisone and injected cortisone suppress the immune response PRP depends on).
Medications that increase bleeding risk include blood thinners like warfarin (Coumadin), apixaban (Eliquis), rivaroxaban (Xarelto), and dabigatran (Pradaxa). These do not impair platelet function directly but increase bleeding at the injection site. You must consult your cardiologist or prescribing physician before stopping any blood thinner — never stop these medications on your own, as doing so can increase stroke and heart attack risk. Most other prescription and over-the-counter medications are compatible with PRP. Acetaminophen (Tylenol) is safe both before and after PRP. Common joint health supplements like glucosamine, chondroitin, and collagen are also safe to continue. Patients in Tigard, Oregon receive a complete medication review at their pre-procedure appointment at Active Pain Relief & Wellness.
What To Eat Before PRP
Proper preparation before PRP can optimize the quality of your blood sample and the resulting platelet concentrate. The most important pre-procedure step is hydration — drink plenty of water in the 24 hours before your appointment (at least 64 ounces, and up to 1 gallon if possible). Adequate hydration ensures good blood flow, makes the blood draw easier, and can improve platelet yield. Eat a normal, balanced meal 2 to 3 hours before your appointment — do not fast. A meal including lean protein, complex carbohydrates, and vegetables provides the nutrients your platelets need. Some providers recommend 15 to 20 minutes of light exercise before the procedure, as some research suggests this increases growth factor concentrations in the blood sample.
Avoid alcohol for at least 48 hours before PRP, as alcohol impairs healing and can affect platelet function. Avoid excessive caffeine on the day of the procedure, as it can constrict blood vessels and make the blood draw more difficult. Ensure you have stopped all NSAIDs and antiplatelet medications as directed by your provider (typically 5 to 7 days before). Plan to spend 45 minutes to over an hour at the clinic for the complete procedure (blood draw, centrifugation, and injection). Patients in Tigard, Oregon receive detailed written pre-procedure instructions at their consultation.
Frequently Asked Questions
Is PRP Covered by Insurance?
Most insurance plans do not cover PRP injections for musculoskeletal conditions. Medicare considers PRP experimental and only covers it for chronic non-healing diabetic wounds enrolled in approved clinical trials. The American Academy of Orthopaedic Surgeons confirms that very few insurance plans provide PRP reimbursement. TRICARE previously covered PRP for tennis elbow and mild to moderate knee osteoarthritis, but this provisional coverage ended in September 2024. Out-of-pocket costs typically range from $500 to $2,000 per injection. Patients in Tigard, Oregon receive transparent pricing information at their consultation.
Can PRP Cause a Blood Clot?
The risk of blood clot formation from PRP injection is extremely low. PRP is injected locally into a specific tissue (joint, tendon, muscle) — it is not injected into a blood vessel. The concentrated platelets work locally at the injection site to promote healing, not systemically throughout the bloodstream. A 2025 before-and-after PRP guidelines review listed new calf pain or swelling (potential DVT sign) as a rare red flag to watch for, but emphasized that serious complications are uncommon with proper sterile technique. The far more common post-procedure experiences are localized pain, swelling, and temporary inflammation at the injection site. If you experience new calf pain, swelling, shortness of breath, or chest pain after any injection procedure, seek immediate medical attention.
How Soon Can I Walk After a PRP Injection?
Most patients can walk immediately after a PRP injection, though you should take it easy for the first 24 to 48 hours. The Washington University PRP protocol recommends minimizing activity and using ice for the first few days. For knee or ankle injections, walking is generally fine, but avoid prolonged walking, stairs, running, or heavy exercise for 2 weeks. Gentle range-of-motion exercises typically begin at days 2 to 7. Light strengthening (isometrics progressing to isotonic exercises) starts at weeks 2 to 3. Gradual return to higher-impact activities begins around week 6, guided by symptoms and your provider’s assessment. Patients in Tigard, Oregon receive a personalized rehabilitation timeline.
When Can I Shower After PRP?
You may shower the same day or the next day after a PRP injection. The injection site uses a small needle, and the puncture wound is minimal. However, avoid baths, swimming pools, hot tubs, and saunas for 48 hours after the procedure to reduce infection risk. Keep the injection site clean and dry. If a bandage was applied, you can remove it after a few hours or before showering. For hair PRP (scalp injections), some providers recommend waiting 24 hours before washing hair to avoid disturbing the treatment area.
What Happens on Day 3 of PRP?
Day 3 after PRP is typically in the peak of the initial inflammatory phase, which lasts about 7 days. You may experience increased pain, swelling, stiffness, and warmth at the injection site compared to before the treatment — this is expected and indicates PRP is triggering the intended healing cascade. The discomfort is often worse than the original condition temporarily. You should be taking acetaminophen (Tylenol) as needed for pain (not NSAIDs), staying hydrated, and avoiding strenuous activity. By day 3, you can typically begin gentle range-of-motion exercises if comfortable. The increased pain should gradually improve over the next several days and significantly subside by days 7 to 10.
What Happens If PRP Doesn’t Work?
If PRP does not produce meaningful improvement by 6 to 8 weeks, several options exist. Your provider may recommend a second PRP injection (some conditions respond better to a series of 2 to 3 treatments), physical therapy to complement the biological healing PRP initiated, alternative injection therapies (hyaluronic acid for OA, corticosteroid for acute inflammation), or surgical evaluation if the condition is more advanced than initially assessed. PRP works best for mild to moderate disease — advanced osteoarthritis (Kellgren-Lawrence grade IV) with bone-on-bone contact or complete tendon ruptures typically require surgical intervention. Factors that can reduce PRP effectiveness include taking NSAIDs before or after treatment, smoking, poorly controlled diabetes, and very low initial platelet counts. Patients in Tigard, Oregon discuss all treatment options including PRP therapy and other interventions at Active Pain Relief & Wellness.
Take the Next Step
PRP therapy harnesses your body’s own healing mechanisms to treat pain, inflammation, and tissue damage without surgery. With level I evidence supporting its use in osteoarthritis, tennis elbow, plantar fasciitis, and other musculoskeletal conditions, PRP offers a safe, effective alternative for patients who have not responded to conservative treatments or who want to avoid or delay surgery.
If you live in Tigard, Beaverton, Lake Oswego, Tualatin, or the greater Portland, Oregon area and want to learn if PRP therapy is right for your condition, Active Pain Relief & Wellness offers a free consultation with Dr. Jones. Call (503) 336-3322 or visit the clinic at 9975 SW Frewing Street, Suite 110, Tigard, Oregon to discuss whether PRP injections can help your pain and recovery.
