There are many questions you should ask before purchasing a new hearing aid. The most important is "Do I have permanent hearing loss? and if so... Who should I see about this?"
Many people do not have permanent hearing loss and instead have hearing problems caused by ear wax, which can be removed by your GP. Sometimes middle ear infections cause a temporary hearing problem which can be eliminated after medical treatment.
Before purchasing hearing aids, a comprehensive diagnostic evaluation should be obtained, by a registered UK hearing aid dispenser. You should ask the hearing aid dispenser questions about charges for the hearing evaluation, dispensing fee(s), and future servicing and repair.
You should also inquire about the trial period policy and what fees are refundable if you return the hearing aid(s) during the trial period.
Additionally you should ask about the warranty coverage for your hearing aid as well as options for insuring the device.