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.
Flulike Symptoms and Pain. In many cases, eye shingles start by causing flulike symptoms, including fever, body aches, chills, headaches and fatigue. Often these symptoms are followed by pain on 1 side of the head or in 1 eye before any sign of a rash appears.