I became sick and it was a runny nose again. There are hundreds of questions in my head so I decided to search in the internet. Finally, I got the answer. Runny nose occurs when nasal tissues and blood vessels become swollen with excess fluid that runs out from your nose. There are may causes on the website, but I think the cold is my case.
A runny nose is quite annoying because the fluid keeps running out and I won't stop after I sleep. I think the best way to cure this kind of sickness is to have more rest. Everytime after I sleep, I don't have a runny nose. Rest is the most important thing