Pemphigus is a rare group of autoimmune diseases that cause blistering and sores on the skin and mucous membranes. Learn about the types, causes, diagnosis, and treatment of pemphigus, and how to cope with the condition. Pemphigus encompasses a group of potentially life-threatening autoimmune bullous diseases characterised by blisters and erosions of the mucous membranes and skin. Pemphigus vulgaris (PV) is the most common variant and affects skin and mucosa. Pemphigus foliaceus (PF) is confined to the skin. Para... What is pemphigus vulgaris? Pemphigus vulgaris is a rare autoimmune disease that is characterised by painful blisters and erosions on the skin and mucous membranes, most commonly inside the mouth. Learn about pemphigus, an autoimmune skin disease. Explore its symptoms, causes, diagnosis methods, treatment options, and the long-term management tips.