The precautions for the treatment of chronic atrophic gastritis include eliminating the cause of the disease, preventing bile reflux, protecting the mucosa, and preventing cancer. 1. Eliminate the cause: chronic atrophic gastritis is the atrophy of the gastric mucous membrane epithelium caused by Helicobacter pylori infection, diet, medication and other effects on the intrinsic glands. If it is caused by Helicobacter pylori infection, the precautions for treatment should follow the doctor’s instructions to take omeprazole, amoxicillin, metronidazole, bismuth pectin and other drugs to eradicate Helicobacter pylori. 2. Prevention of bile reflux: bile reflux caused by chronic atrophic gastritis treatment precautions to follow the doctor’s instructions to take domperidone, mosapride and other drugs to promote gastrointestinal peristalsis, to prevent the occurrence of bile reflux. 3. Protect the mucous membrane and prevent cancer: chronic atrophic gastritis treatment precautions should also follow the doctor’s instructions to take bismuth potassium citrate, colloidal bismuth pectin and other drugs to protect the mucous membrane, to prevent further damage to the gastric mucous membrane and cancer. But it may also lead to side effects such as black stools and indigestion. It is also necessary to avoid smoking and alcohol, and eat less spicy and stimulating, greasy and other foods as well as drugs that stimulate the gastric mucosa. The above medicines are not recommended to be taken by oneself, all of them should be taken under the guidance of a doctor.