Dr. Scholl's® Moleskin™ Plus Padding
A blister is a bubble of fluid that forms beneath a thin layer of dead skin. The blister fluid is typically made up of water and proteins.
Foot blisters are commonly seen in people who live an active lifestyle. When your shoes rub against the skin on your foot, the resulting friction leads to the development of a blister. This is because the friction causes your skin layers to separate away from each other, allowing fluid (serum) to fill the separation.
Hot or moist skin increases the force of friction, so sweaty feet can also increase the likelihood of developing a blister.