Google for images of shingles, and see how this compares to what you have.
Shingles is a reactivation of the herpes zoster virus.
This same virus causes the childhood illness chickenpox.
The chickenpox virus remains in a dormant state in the body in the root of nerves that control sensation.
In about 1 out of 5 people, the virus "wakes up," often many years after the chickenpox infection.
The virus then travels along a sensory nerve into the skin causing a painful rash known as shingles.
See your physician right away to be examined and diagnosed.
Antiviral medication is effective only if given early.
Information:
http://www.emedicinehealth.com/shingles/page6_em.htm#Self-Care%20at%20Home
Wishing you the best,
Carol