Radial Tunnel Syndrome: Symptoms, Causes & PT Treatment
Updated October 20261 minute read
Radial tunnel syndrome is irritation of the radial nerve as it passes through the outer forearm, causing a deep, aching pain a little below the outer elbow — which can be mistaken for tennis elbow. Unlike tennis elbow, the tenderness is usually further down the forearm and there's typically more aching than sharp gripping pain. It often responds to activity changes, nerve mobility work, and addressing contributing muscle tension.
What is radial tunnel syndrome?
It's compression or irritation of the radial nerve in the forearm, a few centimeters below the outer elbow. It can coexist with or be confused for tennis elbow.
Symptoms
Common features are a deep, aching pain in the outer forearm just below the elbow, worse with repetitive gripping, twisting, or extending the wrist, often without the pinpoint outer-elbow tenderness of tennis elbow.
What causes it / risk factors
Repetitive forearm rotation and gripping, sustained postures, and prior elbow overuse contribute.
How it's diagnosed
Diagnosis is clinical and partly by distinguishing it from tennis elbow (location of tenderness, provoking tests). Nerve studies are sometimes used.
Physical therapy treatment
What a PT does. Your therapist reduces nerve irritation, addresses forearm muscle tension, and uses nerve mobility and graded strengthening. Exercises & progression (overview). Activity modification, radial nerve gliding, forearm mobility, and progressive strengthening. Recovery timeline. Often several weeks to a few months.
Treatment options compared
Conservative care is first-line. Surgery is reserved for confirmed, persistent cases unresponsive to conservative treatment.
Red flags
Seek care for significant weakness extending the wrist or fingers, numbness, or a cold/pale hand.
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Frequently asked questions
No — they can feel similar, but radial tunnel pain is usually a deeper ache slightly further down the forearm.
Sources (5)
- Shamrock AG, Das JM. Radial Tunnel Syndrome. StatPearls. 2023. — StatPearls (NCBI Bookshelf)
- Levina Y, Dantuluri PK. Radial Tunnel Syndrome. Current Reviews in Musculoskeletal Medicine. 2021. — PubMed
- MedlinePlus: Radial nerve dysfunction. — NIH/MedlinePlus
- Hones KM, et al. Establishing the diagnosis of radial tunnel syndrome: a systematic review of published clinical series. Eur J Orthop Surg Traumatol. 2024. — Eur J Orthop Surg Traumatol
- Lucado AM, et al. Lateral Elbow Pain and Muscle Function Impairments. J Orthop Sports Phys Ther. 2022. — JOSPT
This article is for education only and isn't medical advice. Always talk to a licensed clinician about your specific situation.