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.
Earwax only causes problems when there is an excessive accumulation, leading to a blocked ear, which can affect hearing. A blocked ear may also be painful. When the earwax build-up hardens and blocks the ear canal, it forms a plug (blockage). 1  Vertigo - a sensation of slight loss of balance, a feeling that you are moving when you are not.  Cough - this is are and may be caused by nerve-stimulation from the inside of the ear when pressure in the area is increased.