Drinking salt water in the morning to clear the intestines of this argument has no scientific basis, so drinking salt water in the morning does not play a role in clearing the intestines. Drinking salt water in the morning, not only can not play a role in purging, but will stimulate the mucous membrane of the gastrointestinal tract, resulting in decreased gastrointestinal peristalsis, gastric emptying ability to block, resulting in gastrointestinal tract symptoms such as abdominal pain, abdominal distension and other conditions, so in the morning is not recommended to drink salt water to purging. In addition, often waking up early to drink salt water may cause an increase in sodium intake, which may cause an increase in blood pressure and other adverse reactions. If the patient has indigestion and wants to achieve the effect of bowel cleansing, he/she can go to the hospital and take medicines such as lactulose, polyethylene glycol electrolyte dispersions and other medicines to achieve the effect of bowel cleansing under the guidance of the doctor. If the patient has other abdominal symptoms, it is recommended to go to the hospital as soon as possible to identify the cause of the targeted treatment, so as not to delay the condition.