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.
Common reasons for earache include: 1  Fluid building up deep inside the eardrum. Known as glue ear, this affects children more than adults. 2  Infection of the ear canal outside the eardrum (otitis externa) 3  A boil or infected hair follicle in the ear canal.  Eczema in the ear canal ( seborrhoeic dermatitis)