My 10 year old son has a bump on the bottom of his foot about midway and near the outside of the sole. The bump looks like blister because it has a clear head on it but the blister itself is very tough like a callous and the area around the head is swollen and extremely painful. In fact the blister looks a little like a wart; however, I don’t think the bump is either one of these things.
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bump on bottom of foot