Mostly these lesions are centered around hair follicle and associated with oil gland. Acne may be classified as mild, moderate or severe. They may be inflamed papules, pustules and nodules; or non-inflamed comedones and pseudocysts. Individual acne lesions usually last less than 2 weeks but the deeper papules and nodules may persist for months. Many acne patients also have oily skin (seborrhoea). Treatment for acne depends on the patient's age and sex, the extent and the severity of the acne, how long it has been present, and response to previous treatments. - Treatment for mild acne includes topical anti-acne preparations, lasers and lights - Treatment for moderate acne adds acne antibiotics such as tetracyclines and/or antiandrogens such as birth control pill - Treatment for severe acne may require a course of oral isotretinoin.