答:慢性食管炎是一个常见病。30～60岁患病率最高,无性别差异。根据病因和临床表现可分为两类: (一)反流性食管炎:主要是食管下端贲门括约肌功能障碍,导致胃内容物反流入食管、长期作用于食管粘膜,造成局部充血水肿、糜烂、溃疡;由于溃疡的反复形成,导致粘膜下、甚至肌层的纤维化,从而食管发生狭窄。病变以食管下段多见,烧心、反酸、胸骨后烧灼样疼痛为主要症状,易在 A: Chronic esophagitis is a common disease. The highest prevalence of 30 to 60 years old, no gender differences. According to the etiology and clinical manifestations can be divided into two categories: (a) reflux esophagitis: mainly the lower esophageal sphincter dysfunction, resulting in the reflux of gastric contents into the esophagus, long-term effect on the esophageal mucosa, resulting in local congestion and edema, erosion, Ulcers; due to the formation of ulcers repeatedly, leading to submucosal or even muscle fibrosis, resulting in stenosis of the esophagus. Lesions more common in the lower esophagus, heartburn, acid reflux, burning sore-like chest pain as the main symptom, easy to