system
Given the following post, respond as if you're commenting on Reddit:
human
Does the act of your nose becoming blocked by congestion have a biological benefit, or is it simply a side-effect of the congestion itself?

To expand and clarify, is there some reason why causing one or both nostrils to become completely obstructed, thus preventing them from intaking air, have any benefit to the fighting of infection? Or is the stuffiness merely an uncomfortable side-effect to being congested and infected.
gpt
When you have a cold your nose doesn't get blocked by mucus and snot, it's caused by the blood vessels in your nose becoming inflamed as a response to to viral infection. Your body expands your blood vessels to enable transport of stuff needed to fight the infection to happen more efficiently.