Is hearing loss caused by tinnitus or cerebral tinnitus?
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Is hearing loss caused by tinnitus or cerebral tinnitus?
To analyze the causes of hearing loss, we must first segment the time when the deafness occurred. Depends on whether it is congenital deafness or acquired deafness.
What are the causes of congenital deafness?
* Congenital non-hereditary hearing loss: Mainly caused by sensorineural deafness caused by the mother's infection with influenza, rubella virus, etc. during pregnancy. In addition, there may be congenital external ear deformities caused by other reasons.* Congenital hereditary hearing loss: Mainly because the parents themselves carry the deafness gene, causing the child to also have the gene and suffer from sensorineural hearing loss after birth.
Acquired deafness
Except for congenital deafness, all can be classified as acquired deafness. There are many reasons for this. Let’s analyze acquired deafness from other dimensions.
Cerumen blockage, otitis media, eardrum perforation, senile hearing loss, environmental noise, high blood pressure, drug-induced deafness, too much pressure in life, etc.
* Noise-induced hearing loss
It is a type of sensorineural hearing loss caused by long-term exposure to strong noise, mostly related to occupation. If the exposure time is short, the temporary increase in hearing threshold will be restored, and if the exposure time is long, permanent hearing loss will be caused.
This noise is not just noise in the traditional sense, but also includes other sounds exceeding 80dB. For example, if you listen to music with headphones and turn the sound louder (more than 60% of the volume) every time, it may cause noise-type hearing loss in the long run.
* Drug-induced hearing loss
Hearing loss caused by the use of ototoxic drugs. Ototoxic drugs are often antibiotics, such as gentamicin, which was previously the most common. Including quinine, streptomycin, neomycin and kanamycin, often damage spiral ganglion cells, leading to permanent sensorineural hearing loss. Even ordinary drugs such as aspirin can cause temporary threshold shifts and tinnitus; ototoxic toxins are mostly derived from the products of viral infections. They enter the endolymph through blood vessels. These diseases include whooping cough, measles, influenza, scarlet fever, and parotitis. inflammation, diphtheria, meningitis, chickenpox, encephalitis and viral pneumonia. Except for mumps, which causes unilateral deafness, the others are all bilateral sensorineural deafness. Toxins that damage the inner ear include carbon monoxide, lead, mercury, and gold. , arsenic, tobacco and alcohol, etc.
Some people think that the order of ototoxicity of this type of drugs is: neomycin>gentamicin>tobramycin>kanamycin>streptomycin>amikacin>normycin.
This type of antibiotic-induced deafness has three characteristics that should attract attention. For example, hearing damage caused by gentamicin, streptomycin, etc. first occurs in the high-frequency area of the inner ear, causing high-pitched hearing loss. It is generally not easy to be noticed. After several weeks or months of taking the medicine or half a year or one year after stopping the medicine, the hearing loss will disappear. The toxicity extends to low-frequency areas, and patients have difficulty listening. This is called "delayed ototoxic reaction," which is most common in infants and the elderly. Another example is neomycin, kanamycin, etc., which have been completely decomposed and excreted in the body even if they are stopped. However, the degeneration of inner ear hair cells and the degeneration and atrophy of auditory nerve cells caused by the drugs continue until hearing Complete loss, turning into total deafness, is called "progressive ototoxic reaction". Another example is that someone who injected only half of streptomycin immediately developed severe dizziness and tinnitus, followed by rapid hearing loss, nausea, and deafness. This is called an "allergic ototoxic reaction." Most of these patients have a family history of sensitivity to such drugs.
* Senile hearing loss
Hearing loss caused by age. It mostly manifests as high-frequency hearing loss. Clinically, the symmetrical and progressive neurological deafness that begins to appear in old age is called presbycusis. The human body will experience a series of aging phenomena with age. Presbycusis is a hearing loss caused by the aging of the auditory system. obstacle. According to audiology research, men begin to experience hearing loss after about the age of 45, and women begin to experience hearing loss later. With the extension of human life span and the increase in the elderly population, the incidence of deafness in the elderly has also increased. According to statistics, people over 65 years oldOne third of the population will have some degree of hearing loss. 50% of people over the age of 75 have some degree of hearing loss.
* Hearing loss caused by trauma or inflammation
For example, excessive ear cleaning can damage the tympanic membrane, resulting in hearing loss. There are also cases where unclean ears lead to excessive cerumen (earwax), which blocks the ear canal and leads to hearing loss. In addition, inflammation such as otitis media can also cause hearing loss.
* Other sudden hearing loss
Common causes of sudden hearing loss include: excessive fatigue, mental stimulation and psychological stress, dietary factors, seasonal factors, high Blood pressure, hyperlipidemia, diabetes and other factors.
In short, hearing loss may occur due to many reasons in life. Hearing loss will not only affect the normal life of the patient's friends, but may also affect communication with others. Therefore, if you find that you have symptoms of hearing loss, you must go to the hospital as soon as possible to find out the cause and provide targeted treatment, so that you can get rid of the pain caused by hearing loss as soon as possible. At the same time, you should pay attention to protecting your ears in daily life.