What is gynaecomastia? - NHS - swollen breast in men

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Enlarged breasts in men (gynecomastia) - Symptoms and causes - Mayo Clinic swollen breast in men


Learn how an imbalance of the hormones estrogen and testosterone can cause swelling of the breast tissue in boys or men.

Gynecomastia is an enlargement or swelling of breast tissue in males. It is most commonly caused by male estrogen levels that are too high or are out of balance .

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When a man's breasts swell, a hormone imbalance may be the cause. Swelling of the breasts may happen unevenly, with one becoming.