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.
The ear canal is lined with hair follicles and glands that produce a waxy oil called cerumen. The wax will most often make its way to the opening of the ear. There it will fall out or be removed by washing. Wax can build up and block the ear canal. Wax blockage is one of the most common causes of hearing loss.