Gynecomastia (guy-nuh-koh-MAS-tee-uh) is an increase in the amount of breast gland tissue in boys or men, caused by an imbalance of the.
When a man's breasts swell, a hormone imbalance may be the cause. But males also make some estrogen -- the hormone that steers sexual.
Gynecomastia is a condition in which breast tissue forms in guys, usually due to normal hormonal changes during puberty. Hormones are chemicals produced.