Waiting times information is also used locally in the. management of elective surgery. National data on elective surgery waiting times includes data on the clinical urgency of the. patient, that is, on how quickly the patient should have surgery.
These areas of skin have the most oil (sebaceous) glands. Acne occurs when hair follicles become plugged with oil and dead skin cells. Hair follicles are connected to oil glands. These glands secrete an oily substance (sebum) to lubricate your hair and skin.
Primary causes of acne. 1  Excess sebum, or oil gland, production (influenced by hormones). 2  Skin cells that shed become abnormally sticky and accumulate, or clog up, in the hair follicle (influenced by hormones). 3  Increased number of the acne-causing bacterium Propionbacterium acnes, or P. acnes. 4  Skin inflammation. more information...