Gynecomastia is a relatively common condition, affecting up to 70% of adolescent boys during puberty. It is also common in older men and can affect up to 65% of men over the age of 50. Gynecomastia can occur at any age and is typically caused by an imbalance of hormones in the body, such as an increase in estrogen or a decrease in testosterone. Other potential causes of gynecomastia include certain medications, drug and alcohol use, and underlying medical conditions. While gynecomastia is not typically a serious medical issue, it can cause psychological distress and affect a person’s quality of life.