Enlarged breasts in men, a condition known as gynecomastia, is very common among newborn and adolescent boys, as well as men ages 50 and older.It's caused by a hormonal imbalance, typically resulting from decreased testosterone, increased estrogen, or some combination of the two.New fathers experiencing a decline in testosterone might be especially concerned about this, despite the fact that it has no impact on physical health - because it sure impacts mental health.
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