Whether it’s from overindulging at a party or mindlessly eating a bag of chips while watching a new show, nothing is more uncomfortable than not being able to button your pants from water bloat. Excess sodium is usually the culprit. Holding onto too much sodium not only causes fluid retention, but may also increase blood pressure. To restore balance, and feel more comfortable in your pants, flush sodium out of your system by upping your water intake and eating high-potassium foods. . . . Your kidneys are responsible for getting rid of sodium in your urine. Drinking more water increases urine production and helps flush out excess sodium. On average, adults need 8 to 12 cups of water a day to replace normal losses, which means you may need to drink more to get rid of the extra sodium in your system.