The cause of acne vulgaris is

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The cause of acne vulgaris is unknown. Research on the cause, however, links it to hormonal changes of adolescence that affect the activity of the sebaceous glands. Hereditary tendencies are also known to be predisposing factors. Precipitating factors may include food allergies, endocrine disorders, psychological factors, fatigue, and the use of steroid drugs. Sebum, an oily substance produced by the sebaceous glands, reaches the skin surface through the hair follicle. Overproduction of the oil seems to stimulate the follicle walls, causing a faster shedding of skin cells. This causes the cells and sebum to stick together and form a plug, which promotes the growth of bacteria in the follicles. This is the process by which pimples and nodules form.

The Cause of Acne Vulgaris Is