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Hiccups can occur for a variety of reasons. These include eating too much, swallowing air while chewing, or even being anxious or excited. These same triggers can cause babies to hiccup, which is not usually a problem for a healthy child. Itâs easy for a baby to swallow some air while feeding, and extra air can increase the risk of hiccups. This is why itâs important to burp your baby to get the air out of their tummy. Air in the tummy can also make babies uncomfortable and may cause them to spit up.
Causes of hiccups. Hiccups occur when your diaphragm (the thin layer of muscle that separates your chest cavity from your abdomen) suddenly and involuntarily contracts (tightens).As your diaphragm contracts, it causes you to breathe air in very quickly.The incoming air is stopped when your glottis (the opening between your vocal cords) closes suddenly, producing the characteristic sound of a hiccup.s your diaphragm contracts, it causes you to breathe air in very quickly. The incoming air is stopped when your glottis (the opening between your vocal cords) closes suddenly, producing the characteristic sound of a hiccup.