Almost all teens get acne. It happens when an oily substance called sebum clogs pores. Pimples usually pop up on the face, neck, back, chest, and shoulders. Acne isn't a serious health risk, though severe acne can cause permanent scars. Acne can also damage self-esteem.The exact cause of acne is not known, but hormones called androgens can play a role. Androgens increase in both boys and girls during puberty. Androgens make the skin's oil glands get larger and make more sebum. Androgens also can increase because of hormonal changes related to pregnancy or starting or stopping birth control pills. Acne and pimple treatment include Laser and light therapy, chemical peels, dermabrasion, acne mediciations and lifestyle changes. Females with pimples often find signs and symptoms worsen one or two weeks before their period (menstrual cycle) arrives. Hormonal levels may be affected by anxiety or stress, especially levels of adrenaline and cortisol. Both these hormones are thought to make acne worse. Dermatologists or cosmetologists (doctors who specialize in skin problems) often treat acne, particularly in severe cases. Family or general practitioners, pediatricians, or internists can treat milder forms of acne. Over the counter or acne products help in acne treatment. Oral antibiotics are thought to help control acne by curbing the growth of bacteria, thereby decreasing inflammation. They are usually taken daily for four to six months and then tapered and discontinued as acne improves. Acne can be treated with a series of intralesional cortisone injections. A red light therapy can be used to decrease inflammation and bacteria on the skin. A salicylic acid peel can be used to unclog the pores.