A common risk in EoE is narrowing and scarring of the esophagus. This causes food to go down slowly and stick. Even with medication treatment, the esophagus will remain narrow and you may not feel the medication benefits. Dilation, or stretching, is done while you are having an upper endoscopy. While it is disrupting the mucosa, doctors carefully examine how receptive your esophagus is to dilation and only stretch a little bit each time. Watch the video below as Dr. Jeff Alexander at Mayo Clinic Rochester talks about dilation and the risk and benefit for eosinophilic esophagitis.