fluid retention in legs Water gets out of the system through the kidneys, bowel, lungs, and skin. keep in mind that quite a bit of water leaves the body through noticeable sweating. Unnoticeable sweating, called insensible sweat, also accounts for a fair amount. Remember that the picture can vary with your diet. Vegetables, fruits, and carbohydrates have quite a bit more water in them than fats and proteins. How much salt you use will make a difference since it causes your body to retain water. Your physical activity will make a difference also. The more active you are, the more water you get rid of. , Allergic reaction A fast or irregular heartbeat (tachycardia) , It occurs most often at the end of the day or after long periods of traveling while in a seated position. Excess retention is much more common in women than men because of the effect of female hormones on the body's metabolism and circulation. , unplanned pregnancy SWOLLEN ANKLES