Just as there are different types of hearing loss, there are also different types of hearing aids. They vary from brands, styles, and technology levels, so your audiologist has to take everything into consideration before making a choice for you. Some problems that affect hearing are temporary and can be rectified by treatment such as impacted wax or infection, resulting in a return to normal hearing function. But other problems are permanent, including an age-related hearing loss that involves the inner ear, and hearing aids may be needed. Often you will notice subtle problems later once you become more used to a new hearing aid or a pair of hearing aids, so ask about when you should follow-up to see if further adjustments are needed.