system
Given the following post, respond as if you're commenting on Reddit:
human
Why does your throat get sore?

This might be a really silly question, sorry.

When you get a cold, why does your throat get sore? I understand why your nose might run or get blocked and why you might have a cough or a headache etc, but I can't think of why your throat gets sore. What immune purpose does it serve?
gpt
Long story short, when your cells become injured or infected by bacteria or viruses they kill themselves. When it's dry out the mucus that normally lines your throat dries up faster than it can coat/keep your throat clear and clean and the cells lining your throat die or get killed by your immune system to prevent other cells from getting infected. Normally these cells come in layers, the outside layer is supposed to die but just like your skin if you go too many layers down it hurts or becomes sensitive.