Musculoskeletal Condition · Glastonbury, CT

Radial Nerve Entrapment (Radial Tunnel Syndrome)

Outer forearm pain may be radial tunnel syndrome, often confused with tennis elbow. Learn about evaluation and treatment with Dr. Paul Tortland, DO.

Written and clinically reviewed by

Paul D. Tortland, DO, FAOASM, CAQSM, RMSK

Dr. Paul Tortland, DO is a non-surgical orthopedic & sports medicine physician specializing in regenerative orthopedics and surgical alternative treatment. He is dual board-certified in Sports Medicine & Osteopathic Manipulative Medicine (OMM) and Regenerative Medicine, Fellowship-trained in Sports Medicine. He became the first physician in the world to earn board certification in Regenerative Medicine in 2015. Diplomate, American Board of Regenerative Medicine (ABRM), 2015. Registered in Musculoskeletal Ultrasound (RMSK).

Condition

What is radial tunnel syndrome?

Radial tunnel syndrome is a squeezed nerve in the outer forearm that causes an ache below the elbow, and it can feel just like tennis elbow. Telling the two apart matters, because they are treated differently. Dr. Paul Tortland, DO, uses a careful exam and ultrasound to tell them apart, and may use hydrodissection (fluid that helps free the nerve) when the nerve is the source.

Explore related conditions: Browse the Elbow, wrist and hand condition hub for related diagnoses and treatment options.

CARE OPTIONS

How is radial tunnel syndrome treated?

Dr. Tortland’s potential treatment options: Dr. Tortland first distinguishes radial tunnel syndrome from tennis elbow and other causes of forearm pain. For selected, confirmed peripheral nerve entrapment, he may consider ultrasound-guided nerve hydrodissection; evidence for this condition is limited, so benefits and alternatives should be reviewed.

Physical therapy and traditional care: Initial care may include activity modification, avoiding repetitive twisting or forceful gripping, and physical or occupational therapy addressing forearm loading and movement mechanics. A careful examination is important because several conditions can feel similar.

When other care may be needed: Persistent pain or weakness despite conservative treatment may warrant nerve testing, imaging, or specialist evaluation. New significant weakness should be assessed promptly.

Common questions

Questions about radial tunnel syndrome

What causes radial nerve entrapment?

The radial nerve can become compressed near the outer elbow or forearm, sometimes where it passes between muscles. Repetitive forearm rotation, forceful gripping or prior injury may contribute. Radial tunnel syndrome can resemble tennis elbow, so careful examination matters.

What are the symptoms of radial nerve entrapment?

Symptoms include aching pain in the upper forearm, often confused with tennis elbow, and sometimes tingling or weakness in wrist or finger extension. Sudden wrist drop needs prompt medical evaluation.

What are the non-surgical treatment options for radial nerve entrapment?

Treatment may include activity modification, therapist-guided nerve gliding, changes to repetitive twisting or gripping, and short-term bracing when appropriate. Nerve testing or imaging may be considered if the diagnosis is unclear. Persistent weakness or symptoms despite conservative care warrants specialist review.

What regenerative options may help radial nerve entrapment?

Ultrasound-guided hydrodissection may be discussed for selected, confirmed radial nerve entrapment. Evidence for radial tunnel syndrome is limited, and this procedure is not appropriate for every source of outer-elbow pain. Examination should distinguish it from tennis elbow and other conditions first.