A few days ago, I suddenly overcame my fear of getting water up my nose while in the swimming pool, and ever since then, I've been dog-paddling, diving underwater, and splashing around without a care in the world.
Whenever I do this, some water gets up my nose. This is a little uncomfortable, but for me, there are no obvious problems—I can still breathe through my mouth, and I don't inhale any water.
So my question is, are there any disadvantages to letting water enter the nose? Will it cause health problems or something, or am I perfectly fine just continuing as I've been doing?