The x-ray features of the lower esophageal web differ from both the middle esophageal web and the lower esophageal ring. The proximal end of the web (cephalic end) shows symmetrical expansion of the esophagus and the distal end (esophageal vestibular area) shows a double concave surface. This is one of the clinical manifestations of oesophageal webbing and oesophageal rings. The oesophageal web and esophageal ring are easily confused with esophageal muscle contraction and stricture. Strictly speaking, oesophageal web is a thin (2-3 mm) and brittle web-like septum consisting of only the mucosa and submucosa in the lumen of the esophagus, which can be seen anywhere in the esophagus. The esophageal ring often refers to a thick, tough, narrow ring composed of the mucosal and muscular layers of the esophagus. It is difficult to distinguish between the two on X-ray, so the distinction between esophageal webs and rings should be made on the basis of symptoms, signs, X-ray signs, esophageal manometry and endoscopic biopsy. What are the prevention methods of esophageal web and ring? 1, remove the cause of the disease give soft liquid food, forbid feeding coarse, hard, dry, powder and other irritating food. 2, anti-acid antiemetic oral aluminum hydroxide per kg of body weight, 0.1 to 0.3 mg, or magnesium oxide 0.2 mg. If the antacid effect is not good, can be oral metacyanidine guanidine, 5-10 mg per kg of body weight, 2 times / gl. vomiting, oral gastric reanimation, 0.2-0.5 mg per kg of body weight, 2 to 3 times / day. 3, antibacterial anti-inflammatory intramuscular injection of penicillin, streptomycin, 2 times / day; dexamethasone, 0.125-1.0 mg per kg of body weight, 1 time / day. In case of fungal infection, inject amphotericin B, 0.5 mg per kg body weight, once every other day. 4, pay attention to the correct method of eating, develop good eating habits of chewing and swallowing slowly, avoid emotional tension and excitement, avoid depression, and keep a good state of mind. 5, pay attention to iron supplements, eat more iron-rich foods, such as pig liver, fish, lean pork, beef, mutton, soybeans, black fungus, kelp, seaweed, purple cabbage, red dates, red beans, etc. 6, pay attention to proper dietary cooking methods, avoid too hard food, avoid spicy and stimulating food, avoid frying and baking food. The correct method of eating is more effective than the application of antispasmodic drugs. Plummer-Vinson syndrome the first measure is to treat anemia, actively give iron therapy. When hemoglobin rises, dysphagia can disappear. In a few large and thick esophageal webs, if the dysphagia is not relieved by iron supplementation alone, endoscopic electrocautery treatment or dilation with Hurst dilator can be used. Middle esophageal webs are mostly asymptomatic and have a good prognosis, so they often do not require treatment. Once symptoms occur, a probe can be used to dilate or endoscopically remove the esophageal webs or endoscopically remove the webs. In case of acute esophageal obstruction, emergency endoscopic removal or pushing down of the esophageal mass can relieve the obstruction. If necessary, dilatation therapy is often effective. If the annulus fibrosus causes a whorl-shaped stricture, it can be surgically removed. Since the stenotic ring can cause shortening of the esophagus and subsequent hernia formation, it is necessary to repair the esophageal hiatal hernia when the ring is removed, regardless of whether the hiatal hernia is the cause or the effect. In conclusion, the aim of treatment is to break the ring and relieve the obstruction and coexisting reflux.