Remedies for water retention, or edema, vary depending on the underlying cause and location, according to Healthline. For edema most commonly seen in the hands, arms, feet, ankles and legs, remedies include limiting salt intake, eating potassium-rich foods and drinking plenty of water.
Reducing or eliminating salt intake can reduce swelling when combined with other medical conditions, reports Healthline. Increasing potassium helps the kidneys flush salt out of the body while balancing electrolytes and regulating the body's fluids. In addition, drinking plenty of water helps flush toxins from the body by stimulating the kidneys to excrete more water in the urine.