Nerve compression causing forearm pain.
Radial Tunnel Syndrome (RTS) is a condition that causes pain in the forearm due to irritation or compression of a branch of the radial nerve. Unlike some nerve problems that cause weakness or numbness, RTS is usually characterized by deep, aching pain along the forearm that may worsen with certain movements.
Because it does not always show up clearly on imaging or nerve tests, diagnosis relies mainly on a thorough clinical assessment and physical examination by a physiotherapist or physician.
RTS develops when the radial nerve becomes irritated as it travels through a narrow passageway in the forearm called the radial tunnel. This tunnel is surrounded by muscles, tendons, and ligaments, any of which can place pressure on the nerve.
Common causes of compression include:
Risk factors include:
Physiotherapy is the cornerstone of treatment for RTS. Because surgery is rarely the first option, a structured rehabilitation plan can often resolve symptoms and restore function.
Key goals of physiotherapy include:
Your physiotherapist may also recommend temporary splinting to rest the wrist, and use techniques such as nerve glides, stretching, manual therapy, and dry needling to relieve pressure on the nerve.
Recovery timelines vary depending on how long symptoms have been present and how consistently treatment strategies are followed.
Treatment is always tailored to the individual, but common strategies include:
Once symptoms improve, prevention is key to avoiding flare-ups. Physiotherapy places strong emphasis on:
At our clinic, we provide personalized rehabilitation programs for radial tunnel syndrome. We combine hands-on therapy, exercise, and education to reduce pain, restore function, and help you return safely to work, sport, and daily activities. Our focus is not only on recovery but also on long-term prevention.
If forearm pain is limiting your daily life, physiotherapy can help. With the right treatment, you can reduce irritation, regain mobility, and build strength for lasting recovery.
Recover faster, move better, and feel stronger with expert physiotherapy. Our team is here to guide you every step of the way.
Radial Tunnel Syndrome is a painful condition caused by intermittent compression of the posterior interosseous nerve (PIN) in the upper forearm. It typically presents as a deep, aching pain on the outer (thumb-side) top of the forearm. Unlike many nerve conditions, RTS usually does not cause numbness or significant weakness.
Because it often doesn’t show up on standard diagnostic tests, diagnosis relies heavily on patient history and physical examination.
The hallmark symptom is deep, aching forearm pain, especially:
Although they affect similar areas, they are distinct:
Both conditions can occur together in up to 40% of cases, which can complicate diagnosis.
RTS is mainly diagnosed through clinical examination.
Most people improve with conservative care, though recovery can take months.
Non-Surgical Options:
Surgical Options:
If pain persists after 6–12 months of non-surgical care, surgical decompression may be considered. Success rates range from 67–93%, but outcomes can vary.
Factors like co-existing tennis elbow, multiple nerve entrapments, or workers’ compensation cases may slow recovery.
✅ Bottom line: With the right diagnosis and physiotherapy plan, most people with Radial Tunnel Syndrome achieve significant pain relief and return to normal activities without surgery.
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Written by Ellen Davies
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