The acidity of the stomach after gastroenteroscopy polyps may be caused by indigestion, gastritis, gastric ulcer, etc. The acidity of the stomach after gastroenteroscopy polyps may be caused by gastroenteroscopy polyps. 1. indigestion: if you like overeating, spicy and stimulating food and other bad eating habits, it may lead to gastrointestinal tract peristalsis is not good, thus causing indigestion, so there may be the phenomenon of acidity in the stomach after gastroenteroscopy polyps. 2. Gastritis: Gastritis can be roughly divided into acute gastritis, chronic gastritis, etc., is caused by a variety of different factors and acute or chronic inflammation of the gastric mucosa. The patient can be due to dietary stimulation induced gastritis occurs, in the inflammation stimulation, may also appear after gastroenteroscopy polyps eat stomach acidic symptoms. 3. Gastric ulcer: gastric ulcer is the stomach in the ultra-high gastric acid, pepsin under the attack of the gastric mucosal barrier is damaged, when the gastric mucosa damage, will lead to the occurrence of ulcers in the area. Patients with gastric ulcers may then experience symptoms such as stomach acidity, stomach pain, and bloating when eating after having a gastroenteroscopy polyp. When the patient appeared after gastroenteroscopy polyp eating stomach acidic situation, it is recommended to go to the hospital in time to find out the cause of the disease, and then give the corresponding treatment.