The build up of earwax is one of the most common causes of impaired hearing and ear pain. Earwax is a yellow, waxy substance secreted in the ear canal. It plays an important role assisting in cleaning and lubrication and also provides some protection from bacteria, fungi and insects. Excess or impacted earwax can press against the ear drum and block the external auditory canal and impair hearing. Ear drops will help relieve this and other ear infections.