DefinitionBy Mayo Clinic staff
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|Gynecomastia (enlarged male breast tissue)|
Gynecomastia is swelling of the breast tissue in boys or men, caused by an imbalance of the hormones estrogen and testosterone. Gynecomastia can affect one or both breasts, sometimes unevenly. Newborns, boys going through puberty and older men may develop gynecomastia as a result of normal changes in hormone levels, though other causes also exist.
Generally, gynecomastia isn't a serious problem, but it can be tough to cope with. Men and boys with gynecomastia sometimes have pain in their breasts and may feel embarrassed.
Gynecomastia may go away on its own. If it persists, medication or surgery may help.
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