Hi,
If she had a history of chicken pox, this could be
shingles or herpes zoster.
Shingles is an outbreak of
rash or blisters on the skin. The first sign of shingles is often burning or tingling pain, or sometimes numbness or itch, in one particular location on only one side of the body. After several days or a week, a rash of fluid-filled blisters, similar to chickenpox, appears in one area on one side of the body. Shingles pain can be mild or intense.