What do you need to know before undergoing gynecomastia surgery? Gynecomastia is a medical condition that refers to the enlargement of the breast tissue in adolescent boys and adult men. A wide variety of reasons, from hormonal imbalance, obesity, and trauma to pituitary tumors and liver or kidney diseases, cause it. Although the enlargement of the breast tissue can create some tenderness, the condition is not painful, with some exceptions. Read More: https://medium.com/@surgiderma.com/what-do-you-need-to-know-before-undergoing-gynecomastia-surgery-3d3731b4377b