USMC_Trev
Axe-Master
Generally if a patient has Eustachian tube dysfunction they can’t valsalva. If you can’t easily force positive pressure up into your ear, the ear won’t have the ability to vent excess pressure out of the tube.
It can be a good idea to do in some cases for folks that have chronic issues in that it helps keeping the tube from sticking shut, but, it should be done with caution as some folks can over do it and cause some additional problems. Use common sense, don’t blow with all your might and you’ll be fine
The nasolacrimal duct should provide some relief to overpressure, but that duct can only handle so much overpressure.
There was a guy that Howard Stern had on his TV show way back in the early 90's named Kenneth Keith Kallenbach. This dude's gimmick was blowing cigarette smoke through the nasolacrimal duct (while clearly hammered out of his gourd).