Blackheads form when a hair follicle in the skin becomes clogged or plugged. Dead skin cells and excess oil collect in the follicles opening, which produces a bump. If the skin over the bump opens, the air exposure causes the plug to look black, thus forming a blackhead.
Why do blackhead turn black?
When you have blackheads, these large pores become clogged with a substance known as sebum. A chemical reaction with the sebum occurs under your skin. Melanin is oxidized and turns the clogged pores a black color.
What is a blackhead and why is it black?
Normally, hair grows from hair follicles in the pores, and the sebum-producing sebaceous glands lie underneath. When these pores are plugged, the dead skin cells in the open pore react with oxygen in the air and turn black, forming a blackhead.
What happens if you pick a blackhead?
While they arent prone to infection, blackheads can become infected if you pick at them. Picking at a blackhead can break down the wall surrounding the affected pore, allowing bacteria to enter.