Eustachian tube dysfunction can cause many ear issues. One procedure to fix this is a Eustachian Tuboplasty.

The Eustachian tube is a tube that releases pressure from the middle ear into the back of the nose. This tube is surrounded by cartilage and bone and usually releases pressure from the ear like when you're flying or going up in elevations.

If this tube gets swollen either from allergies, inflammation, or infection, then the opening to the tube in the back of the nose doesn't open properly. When that happens the pressure in the ears stays built up, and sometimes fluid can even accumulate in that location.

We have a new procedure called Eustachian tuboplasty where we place a balloon through the nose all the way to the back of the nose. Then, the Eustachian tube opens up and we are able to gently insert the balloon up this tube until it reaches the narrow bony portion. Once the balloon is in the tube we can inflate it, and keep it inflated for a few minutes to allow us to stretch open that Eustachian tube. Finally, the balloon is then removed, the patient is awakened, and people do very well from this procedure.

Once the Eustachian tube is dilated, this is something that should last for a long time, hopefully a lifetime. It's minimally invasive, it's very quick, the recovery is very short, and there's minimal pain involved with this procedure.
https://www.chihealth.com/ENT