Old acid reflux is associated with reflux esophagitis, gastric ulcer, duodenal ulcer, improper diet, and other factors. A part of patients with acid reflux mainly occurs in the early morning time, this situation is related to reflux esophagitis disease, most patients with reflux esophagitis will be accompanied by cardia relaxation symptoms, and at night when sleeping, once the pillow is too low, stomach acid in the stomach will be more likely to enter through the cardia into the esophagus, causing infringement on the esophageal mucosa, which will not only be accompanied by burning pain in the chest area, but also will appear Acid reflux symptoms. Gastric ulcers and duodenal ulcers are caused by the presence of ulcerated surfaces on the mucous membrane of the digestive system, and since the protective barrier of the mucous membrane of the digestive system has been damaged, they are more susceptible to corrosion by gastric acid, resulting in the appearance of gastric acid reflux; in some people, acid reflux occurs some time after the intake of food, which is related to improper diet, such as eating foods that are too acidic, too spicy, or difficult to digest, which It will cause the gastric glands to secrete a large amount of gastric acid, so acid reflux symptoms will appear.