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.
Causes of ear blockage include: Accumulation of wax in the external ear canal: The external ear canal contains several glands which secrete wax or cerumen. The earwax traps dust particles, and later dries and falls off. Excessive wax may result in cerumen impaction and give a blocked feeling.