What are blisters?

Blisters are fluid-filled sacs on the outer layer of the skin. They are formed due to friction, heat or skin diseases. They are most common on the hands and feet.

Types
There are many types of flat feet attending to its cause. In addition, according to Juan Dios,

Prevention

In adults with risk factors for developing flat feet "it could help prevent if these are detected early," says the expert from the General Council of Podiatry Colleges.

Causes
Flat feet occur because the tissues that support the joints in the foot become weak.

As children grow, the tissues tighten and form the plantar arch, around two or three years of age.