Heart, liver, or kidney disease. Sometimes swelling can indicate a problem such as heart, liver, or kidney disease. Ankles that swell in the evening could be a sign of retaining salt and water because of right-sided heart failure. Kidney disease can also cause foot and ankle swelling.
The average human body is estimated to be about 60 to 70 percent water. The percentage may be as high as 75% in infants, decreasing to 57-60% in adults. This does not include water that is part of hydrated chemical compounds in the body, which can only be removed chemically or by heat drying.
Due to their low body fat and bone mass, infants are about 73% water. The body water content of men is about 60%, but since women have relatively more body fat and less skeletal muscle than men, theirs is about 50%. Total body water is a function of age, body mass, and body fat. Due to their low body fat and bone mass, infants are about 73% water. The body water content of men is about 60%, but since women have relatively more body fat and less skeletal muscle than men, theirs is about 50%. Body water declines throughout life, ultimately comprising about 45% of total body mass in old age.