Lying down, stomach grumbling may be bile reflux gastritis, intestinal obstruction and other diseases. 1. Bile reflux gastritis: it is due to the pyloric sphincter dysfunction and other factors that cause the duodenal contents containing bile to flow into the stomach, the patient will have a loss of appetite, defecation, intestinal chirping, nausea and vomiting, etc., and you can hear the stomach gurgling when you are lying down. 2. Intestinal obstruction: the main cause is colorectal tumors, postoperative adhesions, etc., which can cause constipation, no defecation and other symptoms, and thus high-pitched stomach gurgling sound can be heard when lying down. The above are just some of the diseases that need to be alerted to when lying down with stomach gurgling, of course, there will be other more possible diseases. In serious cases, patients are advised to go to the hospital for a thorough examination to determine the cause of the problem.