Sometimes they are due to: Sudden excitement or emotional stress. A temporary swollen stomach
caused by overeating or eating too fast, drinking fizzy drinks, or swallowing
air. A sudden change in temperature (very hot or
cold food or drinks, a
cold shower, etc).A hiccup is an automatic action (a reflex) that the body can't control. During a hiccup your diaphragm (the muscle under your lungs that helps you breathe) contracts. Immediately after this the top of your windpipe (your glottis) closes, making the typical 'hic' sound.
