A. A. A. Complex regional pain syndrome (CRPS), also called reflex sympathetic dystrophy syndrome, is a chronic pain condition in which high levels of nerve impulses are sent to an affected site. Experts believe that CRPS occurs as a result of dysfunction in the central or peripheral nervous systems.
Symptoms of Shingles on scalp. Nerve Pain. The first symptom of shingles outbreak is pain occurring along the path of the nerve in which varicella-zoster virus has become reactivated. The pain varies in intensity between individuals from mild to very intense.
Ramsey Hunt Sign. Shingles can form on the face and neck and around the ear and mouth. However, the Ramsey Hunt sign occurs when the shingles virus invades the facial nerve. This condition can cause severe pain in the ear. It can also cause hearing loss, dizziness and facial paralysis and pain in the facial area.