Shingles is an infection caused by the same virus that causes chickenpox. It occurs in people who had chickenpox previously when the inactive virus becomes active again. The symptoms include a rash on the side of the body or face which develop into small blisters that dry out and scab over within several days. When the rash is at its peak, you can experience anywhere from a mild itching to extreme and intense pain.
When the pain of shingles remains after the rash is gone, it is Post Herpetic Neuralgia (PNH). PNH typically occurs in the area where the shingles occurred. The pain can be intermittent or constant and a range of mild to extreme. Just touching the skin can set it off. It can last weeks, months and even years. While the cause of PNH is unknown, it may be due to residual damage or inflammation in the nerve after shingles resolves.
Post Herpetic Neuralgia treatment aims to soothe and quiet the misfiring nerves that are creating the pain.