Acne is a skin condition that affects the skin’s oil glands. The small holes in your skin which are called pores, join to the oil glands under the skin. These glands produce an oily substance called sebum. The pores connect to the glands by a canal called a follicle. Inside the follicles, oil carries dead skin cells to the surface of the skin. A thin hair also grows through the follicle and out to the skin. When the follicle of a skin gland clogs up, a pimple grows.
The sebum and skin cells can sometimes clump together into a plug. The bacteria in the plug causes swelling. Then when the plug starts to break down, a pimple grows. There are different type of pimples, the most common are the following:
Whiteheads – These are pimples that stay under the surface of the skin.
Blackheads – These pimples rise to the skin’s surface and look black. The black colour is not from dirt.
Papules – These are small pink bumps that can be tender.
Pustules – These pimples are red at the bottom and have pus on top.
Nodules – These are large, painful, solid pimples that are deep in the skin.
Cysts – These deep, painful, pus-filled pimples can cause scars.