Friction blisters typically appear on the heels, toes, or sides of the feet where the skin is thickest ... it can cause serum to leak from blood vessels and form into vesicles.

Blisters commonly happen on your heels, toes, or other parts of your feet, but they can really happen ... as a sac filled with clear liquid or blood, according to the Cleveland Clinic.

Learn more Blisters ... unto our feet in the most literal sense. They are an actualized punishment left behind by our shoes: a reminder that we irresponsibly forsook our own toes and heels.