“A blister can be formed when fluid fills within the top layer of the skin. This can be caused by mechanical friction, tissue damage from burns, or from freezing temperatures. As well as allergic reactions and certain skin conditions such as fungal skin infections,” says Marion.
Blisters are a common complaint of runners, hikers and other outdoor activity enthusiasts, those wearing high heels and people sporting new footwear for the first time.
These blisters are caused by frictional forces where repetitive rubbing causes separation of the skin cells. In the space that this separation creates, fluid can form. Blisters are painful, and they can also cause infections like cellulitis.