Peradventure have you ever been down with acute rhinitis? Likely did you get rid of it? Certainly you got over it! You can't heal a runny nose itself, but your system generally develops immunity to any type of cold infection within several weeks. That is called being cured by your very own immunity!Grownups have in the past had a great deal of the runny nose infections. Parents have developed resistance to the ones they have actually suffered from. Therefore there are not quite as many runny nose infections around for adults to become infected with. That is why grownups only succumb to a few colds annually and kids acquire a dozen colds each year.