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.
Symptoms of Shingles: Introduction. Symptoms of shingles affect the nerves and the skin and can occur in almost any part of the body. However, shingles most often affects one side of the trunk. Symptoms generally begin with sensations of itching, tingling, and/or a severe burning pain in the affected area.