Are these blisters small? Or large like boils? You may have shingles if it's small blisters. Best to get them looked at sooner rather than later as shingles can become very painful and if left untreated can cause permanent nerve damage and pain.
Hope you feel better soon!
Lynnwood, Lupus & Sjogren's Moderator, Dx: 2002DIAGNOSING LUPUS & HW's LUPUS 101
"Life is far too important to be taken seriously." - Oscar Wilde