I am having the saame problem with a blistery rash. It has been diagnosed as poison ivy, but I am not sure it is. It keeps coming back in the same places and I break out at different times, not all at once. The arm, thigh, bicept area, etc. I wa also told it could be Bullous Pemphigliod ( an auto immune disease which makes more sense to me. I don't know where I would be getting the poison ivy from) by a Dr.
(immune-allergy specialist), but the dermatologist said it is classic poison ivy. It has bee4n hapening at different time for about 4-5 years now. Any one have any ideas. I have also washed everythinng I own, etc.