Quite broad question: All the conditions you are asking about can be examined by a podiatrist. The cause of each and the appropriate treatment is not the same for all. Warts are viruses resulting in a skin lesion. Calluses/corns are your skin's way of protecting itself from pressure. Blisters are breaks/peels in the skin resulting from friction but can be the result of internal injury/inflammation. Get checked.
Answered 11/30/2014
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