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.
Some may be directly related to the ears while others may stem from elsewhere. Sometimes, pain originating from the ear can also cause pain in the back of head. 1  Otitis Media-Otitis media is commonly known as middle ear infection. 2  Most often, otitis media begin with an infection. 3  These infections can also cause sore throats and colds. 4  The infections can either be bacterial or viral.