Mate, get this fixed real quick. I nearly lost my job over it, as it caused all sorts of problems, unknown to myself, it became blocked after dental work, and the Doc was quite sure I had Meniers Disease, as I started to bleed from the left ear everytime the A/C got to a certain height, most off putting to my F/O as you can imagine, also I got dizzy for no apparent reason, sooooo go see a ENT bloke before you start flying if no help from your GP.....