Blackheads as we know them are a EXTREMELY stubborn kind of skin problem. Some blackheads when never treated timely develop roots within the skin layers. A comedo can be open (blackhead) or closed by skin (whitehead), and occur with or without acne. The word comedo comes from Latin to suggest the worm-like look of a blackhead that has been secreted.
What are blackheads? Blackheads form when a clog or plug develops in the opening of hair follicles in your skin. Each follicle contains one hair and a sebaceous gland that produces oil, called sebum, which helps keep your skin soft. Dead skin cells and oils collect in the opening to the skin follicle, producing a bump called a comedone. They will become darker and eventually black due to the oxidization of skin oil (sebum). Read more