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.
Early symptoms of shingles include: 1  Pain that is itching, stabbing, or shooting. 2  Tingling feeling in or under the skin, which is red in the affected area.nderstanding Postherpetic Neuralgia -- Symptoms. Neuralgia occurs in one part of your body, typically on one side. The condition follows the area that was affected by shingles along the distribution of a specific nerve.