WebMD Answers
Most cases of hiccups resolve themselves in a short period of time and are rarely a medical emergency. See your doctor if hiccups last more than three hours, or if they disturb your eating or sleeping habits.
If hiccups are associated with abdominal pain, fever, shortness of breath, vomiting, coughing up blood, or feeling as if your throat is going to close up, you should seek medical attention.
This answer should not be considered medical advice...
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