Tendonitis

Tendonitis and chronic tendinopathy cause localized pain that outlasts rest. Remix Medical's Houston pain physicians combine ultrasound-guided injection with the loading programs that remodel tendon.

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By Raju Mantena, DO · Pain Medicine PhysicianReviewed Jul 31, 20261 min read

Key takeaways

Tendonitis implies inflammation, but most chronic cases are really tendinopathy — degenerative, disorganized collagen change with limited true inflammation. That distinction drives treatment: acute inflammatory pain responds to anti-inflammatory measures, chronic tendinopathy to progressive loading.
Tendons are strong but poorly vascularized and slow to heal, so tendon pain often persists far longer than expected — and rest alone deconditions rather than heals a chronic tendon.
Progressive mechanical loading — eccentric exercise and heavy slow resistance training — has the best evidence base and remodels tendon tissue, making it the backbone of recovery, with injections in a supporting role.
Corticosteroid is avoided intratendinously because it can weaken tendon; PRP is an option for chronic tendinopathy that hasn't responded to loading, with evidence stronger for some tendons than others.
Common sites include tennis and golfer's elbow, rotator cuff, Achilles, patellar, and gluteal tendons — and a sudden 'pop' with weakness, especially at the Achilles, suggests rupture and needs urgent evaluation.

Tendons transmit muscular force to bone. They are strong, poorly vascularized, and slow to heal — which is why tendon pain, once established, tends to persist far longer than patients expect. At Remix Medical in Houston, our pain management physicians treat chronic tendon pain with targeted, image-guided intervention alongside the loading programs that actually remodel tendon tissue.

What is Tendonitis?

Tendonitis describes painful inflammation of a tendon or its surrounding sheath. In practice, most chronic cases are better described as tendinopathy — a degenerative, disorganized change in the tendon's collagen structure with limited true inflammation.

The distinction is not academic. Acute inflammatory tendonitis responds to anti-inflammatory measures. Chronic tendinopathy responds primarily to progressive mechanical loading, and injections play a supporting rather than a leading role.

Common Sites and Causes

1. Overuse and Repetitive Loading

The dominant cause. Tendon adapts to load, but only if given time between bouts. Volume increased too quickly outpaces repair.

2. Common Locations

Lateral epicondyle (tennis elbow) and medial epicondyle (golfer's elbow)
Rotator cuff, particularly supraspinatus
Achilles tendon
Patellar tendon (jumper's knee)
Gluteal tendons at the hip
De Quervain's tenosynovitis at the wrist

3. Age and Tendon Quality

Collagen turnover slows and tendon becomes less compliant.

4. Systemic Contributors

Diabetes, obesity, inflammatory arthritis, and certain antibiotics (fluoroquinolones) all raise tendon risk.

5. Biomechanical Factors

Muscle weakness, poor technique, and joint malalignment concentrate load at the tendon.

How Remix Medical Can Help

Diagnosis is clinical and precise — tendon pain is exquisitely localized, and examination usually identifies it. Ultrasound assesses tendon thickness, tears, and fluid within the sheath, and permits accurate needle placement.

Treatment is then matched to whether the problem is acute inflammation or established tendinopathy:

Approach	What it involves
Relative rest + progressive loading	Eccentric exercise and heavy slow resistance training — the intervention with the best evidence base and the backbone of recovery
Medication management	Topical or oral anti-inflammatory measures, with attention to your kidney function
Ultrasound-guided injections	Into the tendon sheath or peritendinous space, with careful avoidance of intratendinous corticosteroid, which can weaken tendon
Platelet-rich plasma (PRP)	For chronic tendinopathy that has not responded to loading, with the honest caveat that evidence is stronger for some tendons than others
Trigger point injections	For the muscular pain that accompanies chronic tendon dysfunction
In-house chiropractic and exercise therapy	Supervised loading and ultrasound therapy through our own team
Orthopedic referral	For tendon rupture or cases refractory to conservative care

Signs & symptoms

Signs and symptoms to watch for

Pain localized precisely to the tendon, worsened by using the muscle it serves
Tenderness on direct palpation
Pain and stiffness at the start of activity, sometimes easing during, then worse afterward
Morning stiffness in the affected area
Swelling or thickening along the tendon
Creaking or crepitus with movement
Weakness in the associated movement

When to see a specialist

Should you see a specialist?

See a pain specialist if tendon pain has persisted beyond six weeks despite rest and activity modification, or if it limits work or sport. A sudden pop with immediate weakness — particularly at the Achilles — suggests rupture and needs urgent evaluation. Warmth, redness, and fever around a tendon can indicate infection and also warrants urgent care.

Treatment options

Possible treatments

Frequently asked

Tendonitis questions, answered

What is tendonitis?

Tendonitis is irritation or inflammation of a tendon, the cord that connects muscle to bone. It usually comes from overuse or repetitive motion and causes pain and tenderness near a joint.

How long does tendonitis take to heal?

Mild cases often improve within a few weeks with rest and load management, but stubborn tendon problems can take a few months. Sticking with the rehab exercises is what shortens it.

Is it OK to exercise with tendonitis?

Gentle, guided movement usually helps more than complete rest, but the aggravating activity should be scaled back. A physical therapist can show you how to load the tendon safely.

When should I see a doctor for tendonitis?

If a sudden sharp pain, a pop, or new weakness makes the joint hard to move, get it checked, since the tendon may be torn. Warmth, redness, and fever also warrant prompt care.

What is the difference between tendonitis and a tendon tear?

Tendonitis is irritation of an intact tendon, while a tear is an actual break in the fibers. A tear is more likely to cause weakness and sudden loss of function, and it's confirmed with an exam and imaging.

Is pickleball elbow the same as tennis elbow?

Usually, yes. Both commonly refer to lateral epicondylitis or lateral-elbow tendinopathy, which causes pain on the outside of the elbow with gripping and backhand motions. Progressive rehab is often central to recovery; persistent pain deserves an exam to confirm the diagnosis.

What is the difference between tendonitis and tendinopathy?

Tendonitis implies active inflammation of a tendon or its sheath. But most chronic cases are better described as tendinopathy — a degenerative, disorganized change in the tendon's collagen with limited true inflammation. The distinction matters: acute inflammatory tendonitis responds to anti-inflammatory measures, while chronic tendinopathy responds primarily to progressive loading.

What is the most effective treatment for tendon pain?

Progressive mechanical loading — eccentric exercise and heavy slow resistance training — has the strongest evidence base and actually remodels tendon tissue. Programs are the backbone of recovery; injections play a supporting, not leading, role.

Do steroid injections help tendonitis?

They can calm acute inflammatory or sheath-related pain, but corticosteroid placed directly into a tendon can weaken it, so it's avoided intratendinously. For chronic tendinopathy unresponsive to loading, PRP is an option, with evidence stronger for some tendons than others.

What raises my risk of tendonitis?

Overuse and rapid increases in training volume, advancing age, diabetes, obesity, inflammatory arthritis, and certain antibiotics (fluoroquinolones), plus biomechanical factors like muscle weakness and poor technique.

When should I worry about a tendon rupture?

A sudden sharp pain with a 'pop,' new weakness, or inability to move the joint — particularly at the Achilles — can mean the tendon has torn and needs urgent evaluation. Warmth, redness, and fever also warrant prompt care.

Sources

References

Beyer R, Kongsgaard M, Hougs Kjaer B, et al. Heavy Slow Resistance Versus Eccentric Training as Treatment for Achilles Tendinopathy: A Randomized Controlled Trial. Am J Sports Med 2015;43(7):1704–1711 — https://doi.org/10.1177/0363546515584760
Cardoso TB, Pizzari T, Kinsella R, et al. Current trends in tendinopathy management. Best Pract Res Clin Rheumatol 2019;33(1):122–140 — https://doi.org/10.1016/j.berh.2019.02.001
Millar NL, Silbernagel KG, Thorborg K, et al. Tendinopathy. Nat Rev Dis Primers 2021;7(1):1 — https://doi.org/10.1038/s41572-020-00234-1
Charnoff J, Ponnarasu S, Naqvi U. Tendinosis (Tendinopathy). StatPearls. NCBI Bookshelf — https://www.ncbi.nlm.nih.gov/books/NBK448174/
National Institute of Arthritis and Musculoskeletal and Skin Diseases: Sprains, Strains, and Other Soft-Tissue Injuries — https://www.niams.nih.gov/health-topics/sprains-and-strains
American Academy of Orthopaedic Surgeons OrthoInfo: Achilles Tendinitis — https://orthoinfo.aaos.org/en/diseases--conditions/achilles-tendinitis/

Your care team

Clinicians who treat this.

Every clinician at Remix Medical is board-certified and owns the practice — so the physician in your exam room is the one making decisions about your care.

Raju Mantena, DO
Pain Medicine Physician
4.8 · 118 Google reviews
Accepting New Patients
Alham Samani, DC
Doctor of Chiropractic
4.9 · 122 Google reviews
Accepting New Patients

Care pathwayChiropractic · Interventional PainICD-10 codeM77.9Associated anatomyTendon, tendon sheath, lateral epicondyle, Achilles tendon, patellar tendon, rotator cuff, collagen

Also called Tendinitis, Tendinopathy, Tendinosis, Tenosynovitis, Tennis Elbow, Golfer's Elbow, Achilles Tendinopathy

This page is for general education and is not a substitute for medical advice from your physician. Contact a Remix Medical clinician about your specific situation.

Updated July 31, 2026. Medically reviewed by Raju Mantena, DO.