How does a runny nose start

HOW DOES A RUNNY NOSE START?

Before your nose started running, bacteria, allergens or a virus attacked and irritated your nose’s lining, which triggered an inflammatory reaction. This inflammation caused mucus production to go into overdrive.

 

Your excess mucus will usually start off clear and runny. This extra, clear mucus is your body trying to get rid of the germs or irritating substance.

 

Your mucus may change color in a few days as your immune system fights to rid your body of the bacteria, allergen or virus.