If I have tendinitis, should I still consider shockwave therapy?

If your tendon pain is truly acute and inflammatory (less than 6 weeks, following a new or sudden increase in activity), anti-inflammatory approaches like rest, ice, and NSAIDs are appropriate first steps. However, if your 'tendinitis' has persisted for 3 months or longer, it has likely transitioned to tendinopathy -- chronic degeneration -- and ESWT becomes a more appropriate treatment option.

Why don't anti-inflammatory medications work for chronic tendon pain?

Research shows that chronic tendon pain typically involves tissue degeneration rather than active inflammation. Anti-inflammatory drugs target inflammation that is largely absent in chronic tendon conditions. This is why NSAIDs and cortisone often provide short-term relief but fail to produce lasting improvement -- they are treating a process that is not driving the problem.

How does shockwave therapy treat tendinopathy differently than other options?

Unlike treatments that target inflammation or mask pain, ESWT addresses the underlying tissue degeneration. The acoustic waves stimulate neovascularization (new blood vessel growth), collagen remodeling, and growth factor release in degenerative tissue. This promotes structural healing rather than symptom suppression, which is why results tend to build over weeks to months.

Tendinopathy vs. Tendinitis and Shockwave Therapy

Your doctor may have told you that you have “tendinitis” – inflammation of a tendon. You may have been prescribed anti-inflammatory medications, ice, and rest. And after months of following those instructions, you may still be in pain.

There is a reason this happens, and it has to do with a fundamental shift in how sports medicine understands chronic tendon problems. The condition you are likely dealing with is not tendinitis at all. It is tendinopathy. And this distinction is not just academic – it changes which treatments actually work.

The Paradigm Shift: From Inflammation to Degeneration

For decades, chronic tendon pain was called “tendinitis” – with the suffix “-itis” indicating inflammation. The treatment approach followed logically: if the tendon is inflamed, use anti-inflammatory tools. Rest. Ice. NSAIDs. Cortisone injections.

But starting in the 1990s, histological studies (examining tendon tissue under a microscope) revealed something unexpected. When researchers biopsied chronically painful tendons, they found:

Disorganized collagen fibers – tangled and haphazard rather than the parallel bundles seen in healthy tendons
Increased ground substance – a mucoid, gelatinous degeneration of the tendon matrix
Neovascularization with nerve ingrowth – new, abnormal blood vessels accompanied by pain-transmitting nerve fibers
Conspicuously absent: inflammatory cells – the hallmark of true inflammation was largely missing

This discovery, documented extensively by researchers like Khan and Cook (Khan et al., 1999, British Medical Journal), led to a terminology shift. The current clinical standard is tendinopathy (tendon disease or pathology) rather than tendinitis (tendon inflammation), because the chronic condition is primarily degenerative, not inflammatory.

Your provider may still use the word “tendinitis” out of habit or because patients recognize it. But the biology underneath that label is degeneration – failed healing – not ongoing inflammation.

Why Anti-Inflammatory Treatments Often Fail

Once you understand that chronic tendon pain involves degeneration rather than inflammation, the failure of anti-inflammatory treatments makes sense.

NSAIDs (ibuprofen, naproxen) target the inflammatory cascade. If there is no significant inflammation to suppress, these drugs may reduce some pain through analgesic effects, but they do not address the degenerative tissue changes driving the problem. Studies have found that long-term NSAID use does not improve tendinopathy outcomes and may actually impair tendon healing (Tsai et al., 2004, Clinical Journal of Sport Medicine).

Cortisone injections are powerful anti-inflammatories. They often produce rapid, dramatic pain relief – which is why both patients and providers like them. But multiple studies have shown that cortisone provides short-term improvement (4-6 weeks) followed by worse long-term outcomes compared to placebo or even no treatment at all for chronic tendinopathies (Coombes et al., 2010, The Lancet). Cortisone may also weaken tendon structure with repeated injections, which matters for load-bearing tendons like the Achilles and the patellar tendon.

Rest alone reduces pain by removing the stimulus, but it does not reverse the degenerative tissue changes. Many patients experience symptom relief during rest that returns immediately when they resume activity.

The pattern is recognizable: temporary improvement with anti-inflammatory approaches, followed by recurrence when the underlying tissue degeneration remains unaddressed.

How ESWT Addresses Tendinopathy

Extracorporeal shockwave therapy (ESWT) works through a fundamentally different mechanism than anti-inflammatory treatments. Rather than suppressing a process (inflammation) that is largely absent, ESWT stimulates biological processes that directly target tendon degeneration.

Neovascularization. Chronic tendinopathy often features poor blood supply to the degenerated tissue. ESWT stimulates the growth of new blood vessels, improving oxygen and nutrient delivery to tissue that has been starved of adequate circulation. Research using Doppler ultrasound has confirmed increased blood flow in tendons following ESWT (Notarnicola & Moretti, 2012, Muscles, Ligaments and Tendons Journal).

Collagen remodeling. The disorganized collagen fibers characteristic of tendinopathy need to be remodeled into the parallel, load-bearing structure of healthy tendon. ESWT activates fibroblasts to increase collagen synthesis and triggers matrix metalloproteinases (MMPs) that help break down disorganized collagen so it can be replaced.

Growth factor release. The mechanical stimulus of shockwaves triggers the release of growth factors – VEGF, TGF-beta, and others – that promote tissue repair and regeneration. These are the same growth factors that are active during normal wound healing but have become dormant in chronically degenerated tissue.

Controlled re-initiation of healing. Perhaps most importantly, ESWT creates a controlled microtrauma that restarts the healing cascade in tissue where the healing process has stalled. Chronic tendinopathy represents a failed healing response. ESWT essentially re-initiates that response, giving the tissue a second chance at repair.

This is why ESWT results develop gradually over 6-12 weeks – the treatment triggers a biological healing process that unfolds on its own timeline, rather than simply masking symptoms.

When ESWT Is Appropriate – and When It Is Not

The tendinopathy vs. tendinitis distinction has practical implications for when shockwave therapy makes sense:

ESWT is typically appropriate for:

Chronic tendon pain lasting 3+ months
Tendon pain that has not responded to rest, physical therapy, or anti-inflammatory treatments
Conditions diagnosed as tendinopathy on imaging (ultrasound or MRI showing degenerated tissue)
Patients looking for a healing-oriented approach rather than symptom management

ESWT is typically not appropriate for:

Acute tendon injuries (less than 6 weeks old) with active inflammation
Partial or complete tendon tears requiring surgical evaluation
Tendon pain with systemic inflammatory conditions (rheumatoid arthritis, for example) where true inflammation is present

The distinction helps explain a common clinical pattern: patients who try ESWT after years of failed anti-inflammatory treatments often respond well, because shockwave therapy is the first treatment they have received that addresses the actual tissue pathology.

Learn more about conditions treated with shockwave therapy to explore whether your tendon condition is a good candidate for ESWT.

The Bottom Line

Chronic tendon pain is usually tendinopathy (degeneration) rather than tendinitis (inflammation). This is not just a semantic distinction – it explains why anti-inflammatory treatments like NSAIDs and cortisone often fail for chronic tendon problems. Shockwave therapy targets the degenerative process directly by stimulating neovascularization, collagen remodeling, and growth factor release in damaged tissue.

If your tendon pain has lasted more than 3 months and has not responded to rest and anti-inflammatory approaches, the issue may be that your treatment has been targeting the wrong problem. Discuss tendinopathy-specific treatments like ESWT with your provider.

Explore our guide to Achilles tendinopathy or other condition guides to learn whether ESWT is right for your chronic tendon condition.

References

Khan KM, Cook JL, Bonar F, Harcourt P, Astrom M. Histopathology of common tendinopathies: update and implications for clinical management. Sports Med. 1999;27(6):393-408. PubMed
Tsai WC, Hsu CC, Chen CP, et al. Ibuprofen inhibition of tendon cell migration and down-regulation of paxillin expression. J Orthop Res. 2006;24(3):551-558. PubMed
Coombes BK, Bisset L, Vicenzino B. Efficacy and safety of corticosteroid injections and other injections for management of tendinopathy: a systematic review of randomised controlled trials. Lancet. 2010;376(9754):1751-1767. PubMed
Notarnicola A, Moretti B. The biological effects of extracorporeal shock wave therapy (ESWT) on tendon tissue. Muscles Ligaments Tendons J. 2012;2(1):33-37. PubMed

Medical Disclaimer: This content is for informational purposes only and does not constitute medical advice. Shockwave therapy outcomes vary by individual and condition. Consult a qualified healthcare provider to determine if shockwave therapy is appropriate for your situation.