Acne, also known as acne vulgaris, is a long-term skin disease that occurs when hair follicles are clogged with dead skin cells and oil from the skin. It is characterized by blackheads or whiteheads, pimples, oily skin, and possible scarring
The Cause of Acne Scarring. Acne scars are most often the product of an inflamed lesion, such as a papule, pustule, or cyst. Inflamed blemishes occur when the follicle, or pore, becomes engorged with excess oil, dead skin cells, and bacteria. … To repair the damage done to the dermis, the skin forms new collagen fibers.