Q. Are hiccups dangerous?
Hiccups — sometimes called hiccoughs — are not dangerous themselves, and are rarely a sign of a health problem.
However, if hiccups persist for more than 48 hours, you should see a doctor. Hiccups can be a sign of kidney failure, pneumonia, lung tumors, digestion problems and heart attack.
If hiccups are so severe that they interfere with your life, see your doctor. If your hiccups last for more than three hours and you are experiencing severe abdominal pain, or you spit up blood, you should get emergency medical attention.