There is no reliable evidence-based medical evidence to suggest that drinking salt water on an empty stomach can assist in laxation. Drinking large amounts of salt water blindly may cause adverse effects such as increased blood pressure. There is no evidence-based medical evidence that there is a clear relationship between drinking salt water on an empty stomach and laxation. There are many reasons for constipation, and drinking a large amount of salt water blindly may not only fail to achieve the purpose of laxation, but may also lead to a series of adverse effects such as increased blood pressure. If the patient has difficulty in defecation, it is recommended that the patient exercise moderately, pay attention to eating less spicy and stimulating food, drink more water, and eat more food rich in dietary fiber. Follow the doctor’s advice to use lactulose and other laxatives, mosapride and other pro-dynamic drugs, keserol and other drugs for treatment. Constipation patients need to go to the hospital for diagnosis and treatment, so as not to miss the condition.