I am a 44 year old female with large blister clusters that are very painful and extremely itchy that are on only my right buttock. These have been recurring since I was 16 years old. These blister patches originally appeared only on the right side of my nose under my eye...sometimes affecting my vision. But they eventually have stopped coming to my face and now appear in the same general area on my right buttock. I was originally diagnosed by an ER Dr as a spider bite., then at 35 was diagnosed as possibly having Haley - Haley disease, but I was not tested as this disease is genetic. So the treatment is usually a hydrocortisone cream. My question is ... What does this sound like? Are there any good treatments for this? Is this life threatening at all...can this form on internal organs?