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.
Some people experience symptoms beyond pain and rash with shingles. These symptoms may include: a fever; chills; a headache; fatigue; muscle weakness; Rare and serious complications of shingles include: pain or rash that involves the eye, which should be treated in order to avoid permanent eye damage