After enlarged prostate surgery that requires an incision in the prostate gland, you should relax. Any physical strain could tear the incision so avoid heavy lifting, exercise, driving, and even pushing heavily during a bowel movement. This should be easy initially, since you'll probably spend the first few days in the hospital. Also, take care with what you put in your body. This means taking prescribed medications, drinking plenty of water to flush out your system, and avoiding eating foods that will cause you to strain during bowel movements. Procedures that don't require incisions don't require as much attention post-operation, but they're also less reliable at reducing symptoms of an enlarged prostate.