Why does otitis media cause tinnitus?
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Why does otitis media cause tinnitus?
People with normal hearing can hear the buzzing of blood circulation and the trembling of muscles when their eyes are blocked by fire in an extremely quiet environment. Under normal circumstances, this sound is not heard. Because of the masking effect of environmental noise. When conductive hearing loss occurs in otitis media, the intensity of environmental noise is relatively reduced, which reduces the normal masking effect, so tinnitus occurs. This kind of tinnitus is usually a low-key buzzing or roaring sound. If otitis media causes damage to the ear, high-pitched tinnitus may also occur.
Otitis media can be divided into various types of otitis media according to the severity of the disease, but some common points are that most of them are caused by bacterial infection. The most common otitis media can lead to perforation of the tympanic membrane. Tinnitus, hearing loss, or even loss may occur.
For example, acute otitis media is usually infected by the Eustachian tube. Usually during a cold, the nasal mucosa is inflamed, and active bacteria will enter the Eustachian tube from the nasopharynx. The opening directly enters the middle ear, causing inflammation of the middle ear mucosa, which is especially common in childhood. Because the Eustachian tube in adults is narrow, curved and long, on the contrary, in infants and young children, the Eustachian tube is short, relatively thick and horizontal, so bacteria in the nasal cavity and nasopharynx can easily invade, causing acute otitis media or even acute suppurative otitis media, which affects hearing. .
In the middle ear cavity, there is a thin tube leading to the nasopharynx, which is medically called the Eustachian tube. Because children's Eustachian tubes are relatively short, wide, straight, and horizontal, and their body resistance is weak, they are prone to upper respiratory tract infections such as acute rhinitis and tonsillitis, and certain infectious diseases such as measles, scarlet fever, and influenza. It often causes an increase in secretions in the nasopharynx, or when the baby vomits milk, coughs, or twists the nose too hard, bacteria can easily enter the middle ear from the Eustachian tube and become the most common cause of suppurative otitis media.
In addition, if children pick their ears, they may accidentally damage the external auditory canal mucosa or tympanic membrane, causing infection, and may also spread to the middle ear and cause inflammation.