Hearing aids may be associated with increased earwax impaction, as they prevent earwax from being removed from the ear canal, thus causing blockage which leads to it being impacted. It is estimated to be the cause of 60–80% of hearing aid faults. Earwax can get into a hearing aid's vents and receivers, and degrades the components inside the hearing aid due to its acidity. Excessive earwax can also cause tinnitus, a constant ringing in the ears, ear fullness, hearing loss and ear pain.