Hiccups occur very commonly.Hiccups are caused when the diaphragm gets contracted suddenly.The diaphragm is the muscle which is found between the lower ribs and the back which supports the process of breathing.When the diaphragm gets contracted it causes you to breathe quickly as the incoming air is blocked when the glottis gets closed suddenly, leading to the sound of hiccup. Others Searched  hiccups treatment,  what causes hiccups