🏂 Tennis Elbow · Treatment

Your Cortisone Shot Didn't Work — Here's Why (and What to Do Instead)

⚐ Dr. Stephen Chambers, MD📅 May 2026⏰ 6 min read
You got a cortisone injection for tennis elbow. It felt better for a few weeks — maybe a month — then the pain came back. Or it didn't help at all. Either way, you're frustrated and confused. Here's the scientific explanation and the path forward.

Why Cortisone Relieves Pain Temporarily but Fails Long-Term

To understand why cortisone injections often fail for tennis elbow, you need to understand what tennis elbow actually is. Despite the name "epicondylitis" (the "-itis" suffix implying inflammation), tennis elbow is primarily a degenerative condition, not an inflammatory one. Biopsy studies of ECRB tendons in chronic tennis elbow consistently show:

  • Disorganized, degenerative collagen — not inflammatory cells
  • Increased immature blood vessels (neovascularization)
  • Fibroblast proliferation without normal collagen organization
  • Minimal or absent classical inflammatory infiltrate

Cortisone is a powerful anti-inflammatory. It works brilliantly for true inflammatory conditions. But if the primary problem is degeneration, not inflammation, cortisone only treats the pain signal — not the underlying pathology. When the cortisone effect wears off (typically 3–6 weeks), the degenerated tendon is still there, and the pain returns.

Multiple Cortisone Injections Can Make It WorseHere is the part many patients don't hear: multiple cortisone injections to the same tendon are associated with tendon weakening and worse long-term outcomes. Corticosteroids inhibit collagen synthesis and can cause local tendon degeneration at the injection site. Three or more cortisone injections in the lateral elbow are associated with significantly worse outcomes at 12 months. If you've already had two cortisone shots that didn't work, a third is very unlikely to help and may harm the tendon further.

The Evidence at 12 Months

The landmark Coombes et al. study in The Lancet (2013) compared cortisone injection, physiotherapy, and the combination in a randomized controlled trial. The finding that most patients and many doctors don't know:

  • At 4 weeks: Cortisone group had the best outcomes — fastest, most complete pain relief
  • At 12 months: Cortisone group had the worst outcomes — worse than physiotherapy alone, and worse than placebo injection

This "injection paradox" — great short-term, terrible long-term — is the central problem with cortisone for lateral epicondylitis.

What Actually Works Instead

1. Eccentric Physical Therapy (Should Have Come First)

The evidence-based first-line treatment that cortisone injections often bypass entirely. Eccentric wrist extension exercises create controlled tendon loading that stimulates the degenerated collagen to remodel into healthy, organized tendon tissue. Takes 8–12 weeks of consistent effort but produces durable results unlike cortisone.

2. PRP Injection (The Right Injection for Tendinosis)

If an injection is what's needed — for patients with severe pain, for those who have failed PT, or for those wanting to accelerate recovery — PRP is the right injection for tennis elbow, not cortisone. PRP delivers concentrated growth factors that target the actual problem: collagen remodeling and tendon regeneration.

Multiple randomized controlled trials show PRP produces superior outcomes compared to cortisone at 6 months and at 12 months. Where cortisone wears off and leaves the tendon worse, PRP initiates structural improvement that continues for months after the injection.

3. Combined Approach (Best Results)

The optimal treatment for chronic tennis elbow that has failed one or more cortisone injections:

  1. One ultrasound-guided PRP injection to the area of tendinosis
  2. Resume eccentric PT at 1 week post-injection
  3. Continue counterforce bracing during all activity
  4. Activity modification — technique and equipment changes
  5. Follow-up evaluation at 6–8 weeks to assess response

Cortisone Didn't Work? Next Steps.

If cortisone hasn't solved your tennis elbow — whether it stopped working after a few weeks or never worked at all — PRP injection combined with eccentric physical therapy is the evidence-based next step. Dr. Chambers offers ultrasound-guided PRP at four Wake County locations. No referral needed.

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How soon after a cortisone injection can I get PRP? +
Most guidelines recommend waiting at least 4–6 weeks after a cortisone injection before having PRP. Cortisone has local tissue effects that can potentially interfere with the platelet-mediated healing response of PRP if given too soon. Dr. Chambers will determine the optimal timing based on your specific history at your consultation.
Will insurance cover PRP since cortisone failed? +
Unfortunately, PRP is generally not covered by insurance for musculoskeletal conditions regardless of prior treatment history. Many insurers classify it as investigational despite the growing RCT evidence base. Dr. Chambers' office can provide pricing and discuss payment options at your consultation.
I've had three cortisone shots. Is it too late for PRP to work? +
PRP can still be effective even after multiple cortisone injections, though there's a theoretical concern that repeated cortisone may have further weakened the tendon. Dr. Chambers will evaluate your tendon with ultrasound at your appointment to assess the degree of tendinosis and determine whether PRP or a different approach (including surgical evaluation for severely degenerated tendons) is appropriate for your situation.

Elbow Pain Keeping You Off the Court?

Dr. Chambers treats tennis elbow and pickleball injuries at four Wake County locations. No referral needed — same-day appointments often available.

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