Abnormal and irregular bleeding are extremely common in the adolescent period and can be looked upon as a part of normal reproductive development. It is essential to have a firm grasp on the normal, physiologic development of the menstrual cycle. Prompt recognition and treatment of the situations that may indicate underlying disorders or diseases is possible. It is important to recognize the distinct needs, goals, and developmental stages of adolescent patients. No single therapy or approach is universal in the diagnosis and treatment, but must be tailored to the needs of the individual adolescent and her situation.