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 symptoms of shingles include: 1  Pain or a bruised feeling -- usually on one side of your face or body -- often along with a fever, chills, headache, or upset stomach. 2  Tingling, itching, or prickling skin, followed several days later by a group of fluid-filled blisters on a red, inflamed base of skin.