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Quick Answer. Hiccups resulting from surgery may be caused by a reaction to anesthesia or happen as a result of abdominal surgery or medical procedures such as a tracheotomy, states Healthline. Using a catheter to access the heart, bronchoscopy or using a stent in the esophagus can also result in long-term hiccups.
Acid reflux, changes in body chemistry, and conditions affecting the neck, chest, tummy, heart and brain can all cause them. Some medicines and anaesthetics are known causes. Prolonged hiccups can also be a distressing feature of advanced cancer. Learn more about the causes of hiccups.