Drinking salt water at night is not good, it is not recommended to drink salt water at night, usually drinking salt water is used for rehydration, or some people use to promote gastrointestinal motility. If you want to promote gastrointestinal peristalsis, you can recommend drinking it in the morning on an empty stomach. If you want to use it for rehydration, you can consider the appropriate supplement of light saline during the day, it is best not to drink too much saline before bed. Because too much salt water before bedtime, easy to cause kidney burden, people at rest, the organs are in a slow and calm state, if you drink salt water, the kidneys accelerate metabolism, easy to cause excessive pressure on the kidneys, drinking salt water at night is prone to blood pressure abnormalities, it is recommended that you want to drink salt water can drink light salt water, to drink in the morning, try not to drink at night.