Some surgeons recommend not to have surgery if you are more than a little overweight specifically when the BMI is over 30. In this condition, the risks of surgery, infection, pulmonary embolism, and pneumonia considerably increase, and also healing process may be prolonged. Losing weight before breast reduction surgery is also recommended because you can have safer and more ideal results and breast size might decrease due to weight loss so there might be no need for surgery. Moreover, losing weight after the surgery might cause your breasts to get smaller and become droopy so you may not reach your goals.