Generally smaller gastric polyps can drink corn juice the next day after the procedure, but if the polyp is too large and endoscopic mucosal dissection is done, corn juice is not recommended the next day. Gastric polyps endoscopic treatment, according to the size of the polyp and other circumstances, less than 5mm polyps, you can endoscopic clamp removal treatment or endoscopic electrocoagulation; greater than 5mm polyps can choose endoscopic mucosal dissection resection, electrocautery and so on. Generally after endoscopic clamp removal or electrocoagulation of gastric polyps, water fasting is required for 6 to 8 hours, after which diet is resumed, and after endoscopic mucosal stripping resection and electrocoagulation of gastric polyps, fasting is required for 24 to 48 hours, after which fluid diet is resumed. Generally there is a liquid diet to start with for 1 to 2 days, such as rice soup, thin gruel, etc., and you can’t drink gas-producing soymilk, etc. Therefore, whether you can drink corn juice the next day after gastric polyp removal should be based on the size of the endoscopic polyp and strict adherence to the doctor’s recommendations.