system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the benefit of having a stuffy nose when sick?

We get stuffy noses when our nose gets inflamed inside. But what is the point of this inflammation when we are sick? Is there any benefit to it? It only seems like its there to annoy us and make breathing a hard time.
gpt
Inflammation/ mucus help keep more foreign matter/ antigens from entering your body. When you are under attack from an antigen, your immune system responds by upping the amount of mucus to keep out any more antigens. This way your immune system is not overwhelmed. So, although it is uncomfortable, it is an important part of your innate immune system.