What causes brachioradial pruritus?

What causes brachioradial pruritus?

Irritation or injury to nerve roots causes brachioradial pruritus. Doctors have found links between the disorder and two factors:

• Sun exposure: Brachioradial pruritus occurs more often in people who have frequent exposure to ultraviolet (UV) radiation from the sun.
• Spinal problems: Spinal problems that compress (put pressure on) nerves affecting the arms can lead to brachioradial pruritus. Conditions that can cause spinal compression include a herniated disk (damage to the tissue separating the bones of the spine) and osteoarthritis (the wearing down of joint cartilage, the connective tissue in the joint).