One reason is that the Eustachian tube,Why does my ear get clogged when I sleep on my side? Articles which connects the middle ear to the throat, can become blocked. The Eustachian tube helps to equalize air pressure in the middle ear and to drain fluid and mucus from the ear. When you sleep on your side, the Eustachian tube can become kinked or blocked, which can prevent fluid and mucus from draining properly.
Another reason why your ear might get clogged when you sleep on your side is that fluid can build up in the middle ear. This is because the middle ear is lower than the throat when you sleep on your side. This can make it more difficult for fluid to drain from the ear.
Finally, your ear might also get clogged when you sleep on your side if you have a cold or allergies. This is because colds and allergies can cause inflammation and swelling of the
Eustachian tube, which can make it more difficult for the tube to function properly.