By chance have you heretofore been down with a cold virus? Likely did you get rid of the virus? Certainly you recovered! You won't heal a runny nose directly, but your immune system typically creates immunity to a particular cold infection within several weeks. That is called being healed by your personal immune system!Adults have in the past had a great deal of the rhinitis viruses. Adults have established resistance to the ones they have actually had. Therefore there are not as many runny nose infections around for adults to acquire. That is why adults only get infected with a few colds each year and children usually get 10-12 colds per year.