Answer :
She should protect it with bandage.
What is a Blister?
Blisters develop to protect damaged skin and help it heal. They're mostly caused by friction, burns and skin reactions, such as an allergic reaction.
It is a pocket of fluid between the upper layers of skin. The most common causes are friction, freezing, burning, infection, and chemical burns. Blisters are also a symptom of some diseases.
The most common type of blister for most individuals is the friction blister. In their most basic form, they occur due to increased shear stress between the surface of the skin and the rest of the body.
The layer of the skin most susceptible to shear forces is the stratum spinosum. As this layer tears away from the tissues below, a plasma-like fluid leaks from the cells and begins to fill the gap that is created. This fluid encourages new growth and regeneration.
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