Foot blister: A blister on the foot can be caused by friction from improperly fitted footwear, a big bite, or infection by bacteria or fungus. Do not pick at the blister. Cover the blister with a bandage. A friction blister should resolve on its own within a few days. If the blister does not go away, see a doctor. A doctor can examine the blister and drain it with a sterile needle.
Answered 9/4/2020
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