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).
Simply picking and trying to force the blackheads out of the pore with your fingernails can easily damage the pore, scar the skin or lead to worse blackheads. Blackheads are not exactly a health hazard, but they are very frustrating as they come up on the most visible part of our body the face. Often, they are seen right on the nose.