Gynecomastia is the enlargement of male breast tissue, caused by an imbalance between the hormones estrogen and testosterone. It typically results in a swollen or puffy chest that can affect one or both breasts. This condition may be triggered by factors like puberty, aging, medication use, or medical conditions such as obesity or liver disease. Though typically not dangerous, the condition can cause emotional distress and hinder daily activities, such as exercising or socializing. As a result, many individuals seek treatment to restore a more natural chest contour and regain their confidence.