Brachioradial Pruritus

Overview

Brachioradial pruritus is a localized neuropathic itch condition affecting the dorsolateral forearms over the brachioradialis muscle. It is caused by nerve compression or irritation in the cervical spine (C5-C6) and/or cumulative sun damage to cutaneous nerve fibers. Patients experience intense itching, burning, or stinging on the outer forearms that is often refractory to conventional anti-itch treatments.

Key Symptoms

Intense, localized itching on the dorsolateral forearms (over the brachioradialis muscle)
Burning, stinging, or prickling sensation in the affected area
Symptoms are typically bilateral and symmetric
Worsened by sun exposure and warm weather; may improve in winter
Application of ice provides characteristic immediate relief (ice pack sign)
Excoriations and mild hyperpigmentation from chronic scratching

Affected Areas

Dorsolateral forearms (over brachioradialis muscle), Upper arms (less common)

Care Instructions

Application of ice packs to the affected area provides rapid but temporary relief.
Topical capsaicin cream (0.025-0.1%) applied regularly can desensitize nerve fibers over time.
Oral gabapentin or pregabalin may be effective for nerve-related itch.
Sun protection of the forearms is recommended, as UV exposure can exacerbate symptoms.
Cervical spine evaluation may be warranted to assess for nerve compression.
See a dermatologist for proper diagnosis and to rule out other causes of localized pruritus.

Medical Disclaimer: This information is for educational purposes only and does not replace professional medical advice. Always consult a qualified dermatologist for diagnosis and treatment.

Prevalence: Relatively common but underdiagnosed; more prevalent in sunny climates and in adults over 40