Why does it hurt when water flows through your nose?
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So yeah it’s mostly that your mucus membranes in your nose have a very specific balance of chemicals going on (in order to make sure your smell receptors are in good working conditions), and a lot of nerve sensors to tell you if anything is wrong.
Well water, or anything that isn’t mucus/snot is gonna want to suck away some of the balanced chemicals and replace them with water. The scientific term for this is “osmotic pressure” but it’s basically just the “salt water and fresh water REALLY wanna balance out and become brackish water” thing, but for cells and bodily fluids.
Well your body really doesn’t want that to happen because it’s really happy with it’s normal balance, and yells at you if anything disturbs it.
Also water can be a mild abrasive when pushed through tight spaces and the inside of your nose is extremely soft.
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