What Causes an Overgrowth of the Breast Tissue is Men?

Excess tissue can be caused by several things, such as genetics, some medications, some health issues, weight gain and hormonal imbalances. It's best to pinpoint the cause of the excess growth first before considering a treatment. 

Most gynecomastia occur as a result of hormonal changes during puberty and can be temporary.  When it persists and is not desired, surgical intervention is the most effective treatment.  Other less common causes of gynecomastia may include liver disease, testicular tumors, certain medications, marijuana use, anabolic steroid use.  John T.
Nguyen, MD, FACS, FICSDouble Board
Certified Plastic Surgeon