Intake recommendations for iodine and other nutrients are provided in the Dietary Reference Intakes (DRIs) developed by the Food and Nutrition Board (FNB) at the Institute of Medicine of the National Academies (formerly National Academy of Sciences) [2].
Answer. The ear canal has very delicate skin; even a hair may cause itching in the ear. So no wonder itching or irritation is a common complaint from the hearing aid user who comes in for a follow up visit.
Another possible cause of ringing in the ears is excess fluid in the ear canals. Bananas contain potassium, which helps to regulate fluid balance in the body. Or, you could munch on an apple, apricots or asparagus for a potassium-rich snack.