I’m yet another ear sufferer and have battled it for about 3 years. The high pitched frequency started a couple years ago and gets worse when I eat any sugar or carbs. My ears constantly itch too. Yes this is the joys of Candida. Mine gets better with a no carb, no sugar diet along with anti-fungals and every now and then I’ll do a Nystatin or baking soda enema. I do a white vinegar/alcohol solution to treat the fungus inside the canal….but it’s definitely the mucous membranes like Raster said. Mine is way back in the eustachian tube or middle ear area. That can only be cleared by getting rid of this infection and it’s a battle I’m not sure I’m winning at the moment.