Monitor your weight. Weigh yourself once or twice a week, unless your doctor recommends weighing yourself more often. If you are taking diuretics (water pills) or steroids, such as prednisone, you should weigh yourself daily since your weight might change. If you have an unexplained weight gain or loss (2 pounds in one day or 5 pounds in one week), contact your doctor. He or she might want to change your food or fluid intake to better manage your condition.