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.
A foreign object in the ear canal usually feels strange or uncomfortable. Hearing in that ear may be affected. There may be pain if the object injures the ear canal or the eardrum, or causes an infection of the outer ear canal (otitis externa). There may be ringing in the ear and, sometimes, an ongoing dry cough.