- It is a disease of the inner ear which causes dizziness or a sense of imbalance, ringing in the ears (tinnitus), feeling of fullness in the ear and hearing loss. It occurs due to improper fluid drainage leading to abnormal volume composition in the inner ear.
- It is a benign tumour that arises from the vestibular nerve. As the tumour grows it compresses the cochlear and vestibular nerves, usually causing one sided hearing loss, tinnitus, and dizziness. It can also interfere with the trigeminal nerve, causing facial numbness.
- The bones of the inner ear are very hard and mineralised. In otosclerosis these become more vascular and immature, resulting in excessive bone growth and fixation of the bones. This leads to conductive hearing loss. Approximately 90% of people with otosclerosis are unaware of their hearing loss and do not seek treatment when the loss is mild. Tinnitus is present in 75% of patients with otosclerosis and is characterised by a broad-band hissing sound, humming sound, or discrete tones.
- It is an inflammation of the middle ear causes fever, earache, nausea, vomiting, or tinnitus.