(1) Testosterone causes excessive sebum to be secreted from the skin's sebaceous glands.(2) The oily sebum rises up through the hair follicle, providing lubrication for your skin and hair.(3) Excessive sebum production secondary to sebaceous gland hyperplasia is the first abnormality to occur.(4) The glands remain immature until puberty, and it is the secretion of sebum that is associated with pubertal acne.(5) The hormones can cause the glands to make too much sebum .
