Can you tell me is gynecomastia safe for teenagers?

Depends on situation: Since roughly half of males go through transient gynecomastia at the onset of puberty, and most resolve within 6m to a year, it's hard to consider it a horrible affliction. A few will have persistent or dramatic gynecomastia. If its not due to some medical condition or drug use is primarily a cosmetic issue. It can erode someones self concept , surgery is helpful.