system
Given the following post, respond as if you're commenting on Reddit:
human
How does the body create so much mucus so fast and where is it stored?

I have been sick for almost a week, and it seems that I can blow my nose for hours on end and never make any progress clearing anything out. 

Is all this mucus created as it is needed, or is it stored somewhere in the body?
gpt
You have specialized cells in all of your mucus membranes (mouth, sinus, GI tract, etc.) called goblet cells.  They are interspersed within the cells that line the cavities and are always producing mucus to lubricate and protect the surrounding cells.  When you have an infection, mucus production is sped up as a form of protection to try and keep the bacteria/virus out of the tissue (specifically out of your blood).  It is especially ramped up in your sinuses because the mucus there will either be blown out of your nose or flow down your pharynx, into your esophagus, and then digested (destroying the included infection) in your stomach.