Normal body water content accounts for 70% of the body weight, the water content of infants can reach 80%, the body’s blood contains more than 80% of the water content, water in the muscles accounted for 70%-75%. The body’s water content is relatively low can be replenished in the following ways: First, drinking warm water, such as daily water intake of the human body is 2500-3500ml, water content if less than 1%-5%, you can use drinking water to replenish the water content, the daily water intake more than replenishment of 500-1000ml of drinking water, can be replenished water. Second, the body’s water content is less than 10% need intravenous rehydration way to replenish water, can be supplemented with isotonic fluids, such as supplementation of 0.9% saline and 5% dextrose injection, can be supplemented with water. Third, if the body’s water content is particularly low, continuous rehydration methods should be given, such as hypertonic sugar and hypertonic saline, and isotonic glucose saline should be given, which serves to replenish the water content.