1. Causes of sensorineural hearing loss
Congenital hearing loss caused by genetic factors, or damage caused by some harmful factors during pregnancy, such as drugs, infection, affect the development of fetal inner ear.
With the increase of age, all organs of the body will be aging, and the auditory organs will also be aging and degenerating, leading to hearing loss and age-related hearing loss.
The inner ear injury caused by noise stimulation for a long time can lead to occupational hearing loss.
Hearing loss caused by inner ear is caused by strong noise such as war, blasting operation and sudden explosion, which is a kind of shock hearing loss.
The use of some ototoxic drugs, such as streptomycin, gentamicin, kanamycin, etc., or exposure to toxic chemicals such as phosphorus and mercury, may lead to inner ear and auditory nerve poisoning, leading to toxic deafness.
Infected inner ear and auditory nerve poisoning, due to meningitis, measles, mumps, syphilis and other infections, resulting in infectious deafness.
Sometimes toxic dysentery, toxic pneumonia and other bacteria due to excessive toxicity, can damage the auditory organs, but also cause infectious deafness. Due to microcirculation disturbance of the inner ear, insufficient blood supply to the inner ear and hypoxia, it may suddenly occur deaf.
Trauma caused by accidents, such as fighting, traffic accidents, skull damage, brain tissue,
Labyrinthine concussion and accidental injury of the inner ear can lead to hearing loss in middle ear surgery.
When suffering from Meniere's disease, inner ear water loss, often affect the cochlea, resulting in hearing loss.
Tumors in or around the auditory nerve can lead to neurological hearing loss.
Mental stimulation or other psychological factors can lead to hysterical hearing loss.
2. Common causes of conductive hearing loss
Ear deformity: including atresia of external auditory canal, auricle deformity or disappearance, ossicular chain, cauliflower ear deformity or disappearance, etc.
Ear wax embolism: ear wax is usually excluded from the direction of the external auditory canal, but sometimes it will accumulate in the ear canal, forming bolts that can partially or completely block the ear canal. Some ear embolization will not cause hearing loss, but if the ear canal is completely blocked, it will affect hearing. In addition, when the suppository is very close to the tympanic membrane, even if it is only partially blocked, it will cause a certain degree of hearing loss due to the normal activity of the tympanic membrane.
Eczema of external ear: itching and pain of external ear or auditory canal, redness and swelling of external auditory canal skin.