Using nasonex (mometasone) for etd, is it normal for ears to sound like bubbling, keep popping and feel more blocked?

Yes: Etd can lead to an accumulation of fluid behind the eardrums, called serous otitis media. As some air gets through the blocked eustachian tubes, your ears may sound like they are popping, bubbling etc. If the medicine is not working, your middle ear will fill up with more fluid and your ears will sound more blocked. Sometimes this fluid needs to be drained in a quick procedure at the office.

Response to pressure: Eustachian tube is like a dynamic channel which can change its diameter in response to pressure changes in the atmosphere. That is why we get uncomfortable feeling when we travel in an aircraft. Many patients with sensitivity to atmospheric pressure changes get the feeling of popping ears. There is nothing to worry about. Decongestants have helped some patients.