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 signs and symptoms of shingles usually affect only a small section of one side of your body. These signs and symptoms may include: Pain, burning, numbness or tingling. Sensitivity to touch. A red rash that begins a few days after the pain. Fluid-filled blisters that break open and crust over. Itching.