There are three common cases of hard and bulging stomach: 1, bowel movement is not smooth, more bloating in the stomach, and in serious cases even intestinal obstruction, the stomach hard, bulging and painful refusal to press. 2, if there is no intestinal obstruction can also consider whether there is ascites, if there is a lot of ascites, the stomach will also appear harder and more bulging, the form of the stomach bulge and intestinal obstruction drum is not the same, lying down when the stomach bulge, the state is called froggy belly. The state is called froggy belly, because the ascites will flow to both sides of the body, both sides of the waist, so the state of froggy belly when lying down. 3, there are occupancies in the stomach will also appear hard and bulging belly. But the specific situation needs specific analysis, if the simple tummy hard and bulging, bowel movements are not smooth, to see if it is caused by flatulence, you can use laxative methods to see if there is relief. If a specific diagnosis cannot be made after these problems are ruled out, it is recommended to go to the hospital for further related examinations.