The possible causes of stomach grumbling in the morning consider hunger, indigestion, enteritis and other conditions. 1. Hunger: after a night time the stomach is in a state of emptying, when hungry due to excessive secretion of digestive juices but no food intake, the peristalsis of the gastrointestinal tract so that the liquid and gas present in the gastrointestinal tract are mixed with each other, so that there is a grumbling stomach in the morning. 2. Indigestion: When food enters the gastrointestinal tract and is not fully digested, more gas will be produced due to indigestion, and the poor excretion of this gas can cause intestinal tinnitus, resulting in morning grumbling. 3. enteritis: when various causes of intestinal inflammation reaction, can lead to intestinal movement is not coordinated, intestinal peristalsis speed is too fast, resulting in intestinal tinnitus enhancement, so that the patient appeared in the morning stomach grumbling. There may also be other reasons for morning stomach grumbling, it is recommended to go to the hospital in time, complete the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.