Esophageal stricture is one of the complications after ESI, and the incidence of stricture is among 2% and 10% . However, it seriously affects the quality of life to the patient. The reasons of esophageal stricture after ESI are as follow [1, 2, 8]:①Vascular endothelial is injured, chronic inflammation and fibrous scars gradually formed after the sclerosant injected into varices.②Barrier of esophageal mucosa is damaged. ③The muscularis mucosa and propria of esophagus may injure, which would deriectly lead to scar stricture. ④The injection is near the physiological stricture of the esophagus. ⑤The dose of sclerosant is large. ⑥ The sclerosant is intensively injected at the same level of the esophagus, then amount of fibrous scars are formed on the same circumference of the esophagus. ⑦ Repeatedly injections of sclerosant induce the scar tissue overlaped, and interlaced.
The endoscopic treatment for benign esophageal stricture includs balloon dilation, local incision, and stent placement. Balloon dilatation mainly achieves the effect by the mechanical tension of the balloon, on the other side, it will tear the normal mucosa and/or muscularis around esophagus. Local incision esophageal stricture is reliable[10–11], which will significantly relieve the dysphagia in patients. However, there should be alert to the complication of perforation, when the muscularis propria of esophagus are cut. Stent placement will extend the esophageal stricture, however, complications are much more, such as chest pain, reflux esophagitis, displacement or detachment, and tissue embedded stents [12–13].
Ultrasoic endoscopy can clearly show the five layers of the normal esophagus.  When the scar of esophageal inflammatory stricture was detected through ultrasoic endoscopy, it showed that the tissue of scar was more thicker than normal mucosa, and the location and depth of scar could be measured exactly. 
The particularity of esophageal stricture after ESI for esophageal varices is that most patients are accompanied by risk factors such as residual varices, coagulation dysfunction, low immunity. The data of 10 patients with esophageal stricture after ESI in our hospital treated by cutting the scar through ultrasoic endoscopy were retrospective in this article.The dysphagia of stricture were obviously relieved in 9 patients during follow-up among three months to six months, and 1 patient suffered dysphagia again within one month after the treatment. There was no complication of perforation, bleeding and infection among the paitents.The advantage of ultrasoic endoscopy guiding to cut scar were as follow: ① It kept away from residual varices, which avoided the bleeding from varices. ② The scar were cut according the depth measured by ultrasoic endoscopy, which would reduce the complication of perforation. ③ The normal mucosa would not be tear as balloon dilatation.