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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.
Overeating or reflux are the most common causes [of hiccups], and the internet is full of other potential causes. Changes to your the brain can also cause hiccups, and some drugs that act on the brain can cause them. Also, brain trauma (such as stroke) can cause severe hiccups.