Drink plenty of water before your treatment. To calculate how much water you should drink take your body weight in pounds and divide it by 2. This is the number of ounces of water you should drink the day before your treatment. Do not shave the area which will receive the treatment within 24 hours of your appointment as it may cause discomfort. Do not aggressively exfoliate the area as it may cause discomfort. Eat a light, healthy meal before your treatment and empty your bladder before your treatment starts.