By chance have you a while ago suffered through a runny nose? Perchance did you heal from it? Naturally you did! You can not treat a runny nose itself, however your immune system generally creates resistance to any cold virus within a few weeks. We call that healed by your own immune system!

Parents have actually in the past had a great deal of the rhinitis infections. Parents have actually created immunity to the viruses they have actually had. So there are not lots of runny nose viruses around for adults to become infected with. That is why adults just succumb to a few runny noses each year whereas children succumb to 10-12 runny noses per year.
https://manueltxaf.bloggersdelight.dk/2021/07/21/what-is-the-cure-for-hpv/