Blisters - Diagnosing blisters

Blisters from friction or heat usually have an obvious cause, such as sunburn, wearing shoes that rub or heavy manual work.

Blisters are easy to recognise as raised pockets of skin that contain fluid. Blood blisters are usually red or a darker colour.

Blisters that develop without apparent injury to the skin from heat or friction may be the result of a medical condition. If you develop blisters and you're not sure why, see your GP. They will be able to investigate what's causing them.