Chronic gastroenteritis disease itself does not affect breastfeeding, but medications used during treatment may pass into breast milk with blood circulation, so breastfeeding during this time is not recommended. Common causes of chronic gastroenteritis include Helicobacter pylori infection, reflux of digestive juices, and food or drug irritation. Symptoms are common gastrointestinal symptoms with no obvious specificity, such as abdominal pain, bloating, belching, nausea, loss of appetite, diarrhea, and constipation. Diagnosis can be made by gastroscopy, carbon 13 urease breath test, and routine blood tests. Patients can choose acid-suppressing drugs, intestinal probiotics, antibiotics, and gastric mucosal protectants under the guidance of physicians, such as omeprazole, Bifidobacterium bifidum, amoxicillin, and bismuth potassium citrate for treatment. It is recommended that patients wait until the disappearance of gastrointestinal symptoms, carbon 13 urease test is negative, blood routine is normal, after the physician’s judgment, and then reasonable breastfeeding.