You’ve probably experienced a few different types of acne since your teenage years, from annoying blackheads to juicy papules. But if you’ve ever developed one of those large, deep, painful red ...

When a blockage occurs at the infundibulum of a hair follicle, just below the epidermis, the hair follicle is at risk for cystic dilatation. This subsequently causes atrophy of the bulb of the hair, ...