What's your diagnosis? Both pictures view possible presentations. It's not bullous pemphigoid, but the immune system plays an important role in the pathogenesis. I'll post the correct answer in a couple of days!
Correct answer: Severe immunological reaction in respons to poison ivy (Toxicodendron radicans) exposure. When touching this plant, a potent substance in the plant’s oil (called urushiol) may be absorbed into the skin, triggering a serious immune reaction. Intense itching can occur and it may also be quite painful.