Drinking salt water on an empty stomach in the morning can promote defecation, can moisturize the intestinal tract, relieve dry stools, promote intestinal peristalsis and so on. 1. Moisturize the intestinal tract: In the morning fasting state, the body is in a state of dehydration. Drink a cup of warm salt water, while replenishing the body’s moisture, can increase intestinal fluid, thus moisturizing the intestinal tract, this lubrication can promote defecation. 2. Relieve stool dryness: drinking salt water can increase the water in the intestinal tract, thereby relieving stool dryness, easier stool discharge, relieve defecation difficulties. 3. Promote intestinal peristalsis: drinking salt water on an empty stomach in the morning can play a role in promoting intestinal peristalsis. Intestinal peristalsis fast, can promote defecation. However, it should be noted that patients with high blood pressure and cardiovascular disease are generally not recommended to drink salt water on an empty stomach in the morning, you can try to drink warm water, which can also promote the good effect of defecation.