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.
The virus can reactivate (wake up) later as shingles. Symptoms include tingling, itching, or pain in one area of the body, followed by a rash with red bumps and blisters. Luckily, kids and teens almost always have mild cases; severe shingles cases usually affect older people.