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.
Other causes of pain related to the ear include: 1  Injury. 2  Inflammation and infection in the ear canal (the channel between the eardrum and the outside part of the ear). 3  Infection of the external ear and ear lobe (cellulitis)  Neuralgia, pain caused by irritation of the nerves in the ear.