The first sign is usually a tingling feeling, itchiness, or stabbing pain on
the skin. After a few days, a rash
appears as a band or patch of raised dots on
the side of the trunk or face. The rash develops into small, fluid-filled blisters which begin to dry out and crust over within several days. When the rash is at its peak, symptoms can range from mild itching to extreme and intense pain.
My sincere advice would be to consult a dermatologist and get this possibility evaluated.