Water is the source of life, and the body relies on urine to carry metabolic waste out of the body every day. When a person is severely dehydrated, he or she will experience symptoms of dehydration, which can manifest as redness, easy fatigue, memory loss, and kidney stones. Drinking very little water can also make the urine volume insufficient, causing the accumulation of waste in the body and increasing the burden on the kidneys. For healthy people to drink the right water, plain water, warm water, mineral water, lemon water, etc. are good choices for hydration. Recommended daily water intake of about 1500-1700ml can promote gastrointestinal peristalsis. Secondly, after the supplemental water, water is quickly absorbed into the blood by the intestinal mucosa, effectively increasing blood volume, diluting blood, reducing blood consistency and preventing cardiovascular diseases. Drinking water can also effectively prevent constipation, while drinking water can eliminate sweat, lower body temperature, more urine, eliminate body waste. For beauty lovers, drinking water can also promote blood circulation, so that the skin is hydrated and moist. However, excessive water consumption may aggravate the body edema. For kidney disease patients, the amount of water to drink varies from person to person.