Doing ultrasound says that intestinal gas may be caused by intestinal obstruction, constipation, dyspepsia and other diseases. 1. Intestinal obstruction: it is a collective term for any cause of obstruction to the passage of intestinal contents with clinical manifestations such as abdominal distension, abdominal pain, etc., which will lead to the manifestation of much intestinal gas when doing color ultrasound. 2. Constipation: it refers to the decrease in the frequency of defecation, and the amount of feces is small and dry. The main symptoms are reduced frequency of bowel movements, difficulty in defecation, dry feces, sometimes accompanied by blood in the stool, anal pain, diarrhea, flatulence and other symptoms, which can also lead to ultrasound show more intestinal gas. 3. Dyspepsia: refers to persistent or recurrent episodes of epigastric discomfort, which may also include postprandial fullness, abdominal distension, belching, early satiety, anorexia, nausea, vomiting, heartburn, retrosternal pain, regurgitation, etc., which can lead to symptoms of intestinal gas when doing color ultrasound. It is recommended to go to the hospital in time to improve the examination, clarify the cause of the disease under the guidance of professional physicians, and give targeted treatment or therapy.