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.
These factors can trigger or aggravate an existing case of acne: 1  Hormones. 2  Androgens are hormones that increase in boys and girls during puberty and cause the sebaceous glands to enlarge and make more sebum. 3  Hormonal changes related to pregnancy and the use of oral contraceptives also can affect sebum production.cne myths. These factors have little effect on acne: 1  Greasy foods. 2  Eating greasy food has little to no effect on acne. 3  Though working in a greasy area, such as a kitchen with fry vats, does because the oil can stick to the skin and block the hair follicles. 4  This further irritates the skin or promotes acne. 5  Dirty skin.