The mucosa of the esophagus can be divided into five layers according to its location: the mucosal epithelium, which has a strong repair capacity and consists of a complex squamous epithelium that can resist certain irritating secretions; the mucosal muscle layer, which has a submucosal layer composed of connective tissue rich in blood vessels and nerves; the intrinsic muscle layer, which has strong fibers wrapped around the inner ring muscle and the outer longitudinal muscle, and a thin outer layer. The role of esophageal mucosa is mainly to protect the esophagus from damage, mainly to play a protective epithelial role, the esophageal mucosa has a certain resistance to reflux, but the resistance is not as strong as the gastric mucosa and duodenal mucosa. To protect the esophageal mucosa, you can use gum fruit secret or drugs that inhibit stomach acid, such as omeprazole, but the best way is to avoid spicy food and greasy food to stimulate the intestinal tract.