If abdominal pain occurs after eating pineapple on an empty stomach, it is advisable to stop the intake of other foods, especially pineapple and other related fruits, and to use physical methods for symptomatic treatment, such as local heat or spinning and massage of the abdomen. It can also be treated symptomatically with drugs, common drugs generally use acid suppressants, such as omeprazole, pantoprazole, lansoprazole, rabeprazole and so on can be. In addition, drugs to protect the gastric mucosa can also be applied, such as bismuth potassium citrate, magnesium aluminum carbonate, metsylline, misoprostol, aluminum thioglycollate, etc. can be. If the symptoms or discomfort persist, it is recommended to go to the gastroenterology department or emergency department for professional treatment, do not delay the condition by using drugs on your own.