This chapter provides detail description of hyperandrogenism in the adolescent. Chapter has 2 well illustrated diagrams and pictures. Hyperandrogenism, evaluation of hyperandrogenism, laboratory tests and management of hyperandrogenism are described in detail with the help of excellent illustrations. Two cases of hypo gonadotropic hypogonadism are presented for better understanding of delayed puberty. One table is included to highlight causes of hyperandrogenism. Bibliography has 2 references at the end of the chapter for further reading.