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| Keywords: FDA -- Follicle4.jpg en But if the pocket of sebum and bacteria becomes too large the follicle will rupture spilling its contents into the surrounding tissue These tissues are damaged when the body's immune system attempts a repair resulting in a papule pustule cyst or abscess http //www fda gov/fdac/features/2001/sideacne html FDA 2001-03 <gallery> File FDA -- Follicle1 jpg Acne begins in pilosebaceous units which consist of sebaceous glands and a single hair follicle The sebaceous glands produce an oily substance called sebum File FDA -- Follicle2 jpg Sometimes hormones produced in the adrenal glands trigger the production of excess sebum clogging the follicle and leading to bacterial growth The resulting plug can appear dark and is called a blackhead or open comedo File FDA -- Follicle3 jpg If the plug is below the skin surface it is called a whitehead or closed comedo File FDA -- Follicle4 jpg But if the pocket of sebum and bacteria becomes too large the follicle will rupture spilling its contents into the surrounding tissue These tissues are damaged when the body's immune system attempts a repair resulting in a papule pustule cyst or abscess </gallery> PD-USGov Acne | ||||
