You are correct. Bullous pemphigoid is the most common autoimmune subepidermal blistering disorder. It is typically associated with age >70 years, nonatrophic scars, relative sparing of head and neck, and no mucosal involvement. Pruritus is typical. Diagnosis is confirmed by histology and immunofluorescence. Mild to moderate disease is treated with potent topical steroids. Oral steroids +/- tetracycline with nicotinamide are used for severe disease. The patient was blister free 2 weeks after starting prednisolone.