Blackheads, also known as open comedones, are a common type of acne lesion that appears as small, dark bumps on the skin. They occur when hair follicles become clogged with excess oil (sebum), dead skin cells, and bacteria.
Blackheads, also known as open comedones, are a common type of acne lesion that appears as small, dark bumps on the skin. They occur when hair follicles become clogged with excess oil (sebum), dead skin cells, and bacteria.