Plantar hyperhidrosis is where sweat glands are especially overactive. It can leave your feet dripping with sweat for no apparent reason.
Not every sensation of heat is a sign of a blister coming. Some hotspot sensations lasts a long time but never turn into an actual blister. Here's why.
Curious why you've got a blister on one foot only, and not the other. It would actually be weird to get blisters symmetrically on both feet. Here's why.