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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.
What Causes Long-Term Hiccups? Long-term hiccups are most often the result of irritation to the vagus or phrenic nerves, which serve your diaphragm muscle. Such irritation may be caused by gastroesophageal reflux, sore throat, laryngitis, a tumor, cyst or goiter in your neck or even a hair touching your eardrum.