Occasionally, medicines may be used to treat gynecomastia, especially if tenderness is a problem. The medicine will make the extra breast tissue go away. Rarely, surgery may be necessary to remove the extra breast tissue. Treatment is necessary if gynecomastia is caused by a disease or a tumor. If it is due to a disease, the disease itself will need to be treated.
Breast cancer is very rare in males.
Your doctor will probably be able to tell whether the lump is cancer. Lumps caused by cancer are usually not underneath the nipple, but breast tissue from gynecomastia grows in this area. Breast cancer feels different than the breast tissue of gynecomastia. With cancer, there sometimes is dimpling of the skin or a bloody discharge from the nipple. If there is any question that you have cancer, you will need to have a mammogram and a biopsy.