Infectious: (viral) Herpes simplex Varicella-Zoster infection Hand, foot and mouth disease Herpangina Measles (Rubeola) Immunobullous: Pemphigus vulgaris[2] Pemphigoid Dermatitis herpetiformis Linear immunoglobulin-A disease (linear IgA disease) Genetic: Epidermolysis bullosa[3]