Immune-mediated | Leukocytoclastic vasculitis |
Atypical bullous pemphigoid | |
Drug-induced bullous pemphigoid | |
Epidermolysis bullosa acquisita | |
Pemphigus vulgaris | |
Paraneoplastic pemphigus | |
Bullous pyoderma gangrenous | |
Blood-based | Henoch–Schönlein purpura |
Porphyria cutanea tarda | |
Drug-or toxin-mediated | Hemophilia |
Heparin-induced skin necrosis | |
Warfarin necrosis | |
Infectious | Hemorrhagic spider bites |
Necrotizing fasciitis | |
Mechanical | Bullous hemorrhagic cellulitis |
Varicella-zoster virus | |
Friction blood blisters |