dear 16 yr old, don't get upset... idiopathic pubertal gynaecomastia is a very common problem....rule out hormonal problems, get evaluated by a doctor for drug history and examination..... if it is not so disfiguring, can wait and watch for spontaneous resolution, but more often than not surgery will be required,  in the formof of liposuction with a small incision approach for gland excision...