Pronator Teres Syndrome is a rare condition that occurs when the median nerve—a major nerve at or a little below the elbow—becomes entrapped or compressed by surrounding muscles, ligaments or scar tissue.

Common symptoms may include loss of sensation in thumb, index and middle fingers, numbness or tingling from the palm up the forearm and difficulty making a tight fist or rotating the wrist.

Although not to be confused with Anterior Interosseous Nerve Syndrome, which affects the strength and mobility of the thumb and index finger, this condition is treated similarly with rest, non-steroidal anti-inflammatories and sometimes surgical decompression.