Most people prefer to breathe out of their nose. When you can’t breathe normal because your nose feels stuffy and swollen it is irritating. But there are more complications than irritation.
Breathing through the mouth exclusively can cause chronic bad breath known as halitosis. It also causes tooth decay due to hindrance of the natural protection of saliva.
Its can also affect your throat and voice. Your nose makes more mucus to help clear out your offended and swollen nasal passages. That mucus can start to run down the back of your throat. We call this post nasal drip. It can cause sore throat, cough, hoarseness and even loss of your voice.
For infants nasal congestion can be a big problem as it can interfere with feeding.