A bloated, bulging and hard stomach may be related to physiological factors, or it may be caused by indigestion, intestinal obstruction and other reasons. 1. Physiological factors: because the abdomen is cold stimulation, eating too much gas-producing foods such as sweet potatoes, it may cause stomach bloating, bulging, hard. This is a normal phenomenon, through the abdominal massage, hot compresses are conducive to relief. 2. Indigestion: For example, if you eat a lot of cold and indigestible food or overeat, it is easy to exceed the digestive capacity of the gastrointestinal tract, resulting in indigestion, which may cause flatulence, bulging and hardness, and may be accompanied by abdominal pain and burning sensation in the epigastrium. 3. Intestinal obstruction: the disease can lead to the patient’s intestinal contents can not be discharged in a timely manner, resulting in prolonged retention of stool in the intestinal tract, the reaction of gas production, resulting in a bloated, bulging, hard stomach, may also be accompanied by severe vomiting, abdominal pain and other symptoms. The bloating and hardness of the stomach may also be caused by other reasons, to rule out physiological factors, it is recommended to consult a doctor as soon as possible, after a clear diagnosis of the cause, to give targeted treatment.