By any chance have you ever been down with a common cold virus? Possibly did you get rid of the problem? Of course you did! You will not treat a runny nose directly, however your system usually establishes resistance to any type of cold virus within a couple of days. We call that treated by your very own immune system!Adults have in the past had a lot of the cold viruses. Parents have developed resistance to the viruses they have suffered from. So there are not lots of cold infections existing for adults to become infected with. That is why grownups just get infected with a few runny noses per year and kids acquire 10-12 runny noses annually.