Bullous pemphigoid (BP) is a rare, chronic, inflammatory, subepidermal, blistering disease that primarily affects older people (Chan, 2020). The blisters are usually filled with clear fluid and the surrounding skin is often red and inflamed. These blisters can appear anywhere on the body but are typically found on the lower abdomen, groin, upper thighs and arms.
The prevalence of BP has doubled in 20 years, due to population ageing and other factors (Persson et al, 2021a). This article provides details of the latest guidelines, explains what can trigger BP, and how it is diagnosed and treated.