Perhaps have you heretofore been down with acute rhinitis? Possibly did you heal from the problem? Naturally you did! You can not heal a runny nose directly, however your body normally develops immunity to any cold infection within a few weeks. We call that cured by your very own immune system!Adults have already had a lot of the rhinitis infections. Parents have developed resistance to the viruses they have actually suffered from. So there are not lots of cold viruses remaining for adults to acquire. That is why parents just acquire a few runny noses per year whereas kids may get 10-12 colds per year.