Excruciating ear pain on airplanes that last the entire flight. is there anything that i can bring to help with this?

Possible TMD /TMJD: Your pain is apparently related to pressure changes in airplane cabin. It could be 'swelling' of the tissue in the back of the tm joint. This retrodiscaltissue is loose, has a lot of blood & nerve supply. If this area is compressed because of poor jaw alignment, when it 'swells' the pressure would cause ear pain. Using little finger in ear hole feel forward while clenching to check it. Sore?