
4. Persistent Sores
Blisters can be common irritants depending on what was done first to aggravate the skin. Common in warmer temperatures, these sores are often caused by the skin becoming damaged by friction or heat. The damaged upper layer tears away from the underneath layers while a fluid collects between the space.
A Reddit user recalled a blister forming on his leg, and after a few days, it became sore. He mentioned that he thought that it was about to burst, so he put antibacterial cream on it in hopes of helping it heal. But the blister would not go away.