Blackheads are a common type of acne that happens when pores become clogged with oil (sebum), dead skin cells, and sometimes bacteria. Unlike whiteheads, blackheads stay open to the air, and the top surface darkens due to oxidation, giving them their black appearance. Blackheads can appear almost anywhere, but they are most common on the face — especially the nose, chin, and forehead (also called the T-zone). They can also show up on the back, chest, neck, arms, and shoulders
Blackheads are a mild form of acne. They occur when hair follicles become clogged with a mixture of dead skin cells, oil (also called sebum), and sometimes bacteria. The reason they appear black is not because of dirt — it’s because the trapped material reacts with air and oxidizes, turning dark.
