Gynaecomastia is a condition that causes the enlargement of breast tissue in males. It is typically caused by an imbalance of hormones in the body, specifically an increase in estrogen levels relative to testosterone levels.
Gynaecomastia can occur at any age, from infancy to adulthood, and can affect one or both breasts. It is often associated with certain medical conditions, medications, or lifestyle factors such as drug or alcohol use.