![]() Hereditary (genetic) factors seem to be important because a tendency for otosclerosis can be inherited. However, the reason why this occurs mainly in the stapes (and sometimes the cochlea) is not entirely clear. New bone is not made properly and abnormal bone forms. In otosclerosis, it seems that the re-modelling process of the stirrup (stapes) - one of the tiny bony ossicles in the middle ear - becomes faulty. Normally bone is continually being broken down and re-modelled. What causes otosclerosis? Faulty bone formationīone is a living tissue and contains cells that make, mould and take back up (resorb) bone. It occurs when the balance mechanism in the inner ear (the semicircular canals) is affected. This condition develops in some people with otosclerosis, although it is less common. Vertigo is a condition where problems with dizziness and balance are experienced. Tinnitus tends to worsen as hearing loss worsens. Noises heard include ringing, whistles, roaring, machine-type noises, etc. It occurs in about 4 in 5 people with otosclerosis. ![]() Tinnitus is an abnormal noise which you hear but which seems not to come from outside your ear. This may be because other people raise their voices in noisy places. For example, you seem to hear better when talking to someone in a pub or a café that is full of other people. If you have this, you can hear better when there is a lot of background noise. The effect of otosclerosis on your ears is to make your own voice sound loud to you. If you have otosclerosis, you may speak unusually quietly. The hearing loss is usually of lower sounds, whereas age-related hearing loss has more effect on higher-pitched sounds. Without treatment, in time, the affected ears often become totally deaf. In others the hearing loss quickly becomes worse. In some people the hearing loss stays mild for a number of years before getting worse. It usually affects both ears, but not always. The hearing loss may remain mild but commonly it gradually becomes worse. Hearing loss is the main symptom of otosclerosis.
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