Wash around the blister and pat dry, and then cover it with a plaster.
What are blisters?
Blisters are fluid-filled bumps that look like bubbles on the skin. They usually form when someone’s skin repeatedly rubs against something or is exposed to heat. When someone gets a blister, the part of the skin that is damaged leaks fluid that collects under the top layer of the skin, forming the blister.
What to do
If someone has a blister, don’t burst it as this can increase the risk of infection. Wash the skin around the blister with clean water and gently pat the skin dry with a sterile gauze pad or a clean, non-fluffy cloth.
If you cannot wash the area, try to keep it as clean as possible.
If the blister was caused by something rubbing against the skin, cover it with a plaster but make sure the pad on the plaster is larger than the blister area. Ideally use a special blister plaster, as these have a cushioned pad that gives extra protection.