Why do people feel deaf? Why are people deaf?
Senile deafness is a natural law that will occur irresistibly on everyone. Therefore, the age of the general population is60About one-third of those over the age; age is80About one-half of those over the age of age will experience varying degrees of deafness. In terms of individuals, the difference is great. some80Older people over the ages still have good hearing, which is equivalent to listening for 40 or 50 years old; others have severe hearing loss, which is equivalent to the hearing of 60s and 70s. So you need to be very concerned.
Later, with the increase of age, the number of hair cells and spiral neuron cells began to decrease, and the auditory function began to decrease, but this decline was weak and could not be detected.60After the age, the decline of hearing began to become apparent, and senile deafness gradually appeared. This is the most common sensorineural deafness. The characteristics of patients with sensorineural deafness are that they are unable to understand what others are saying, because of language communication barriers, which seriously affect daily life and work, and even affect mood and personality.
Three common reasons for deafness
1Strong sound stimulation and noise
The most common and most easily overlooked factor for deafness is the impairment of hearing by loud stimuli and noise. A very loud sound, when it exceeds a certain intensity, causes hair cell damage. For example, the sound of firecrackers in close proximity, the sound of guns fired, and the sound of machines on construction sites can cause deafness and deafness in severe cases.
In addition, long-term noise exposure can also cause slow progressive hearing damage. The first part of the noise-induced hearing loss is the high-frequency part, while the low-frequency hearing is not affected. At this time, subjective feelings are not hearing impaired, nor does it affect normal language communication and social activities. Hearing damage is further aggravated, extending from the high frequency band to the low frequency band. When the hearing loss of the speech frequency reaches a certain level, obvious hearing impairment occurs. The occurrence and development of noise deafness is directly related to the intensity of noise and contact time. The greater the intensity, the longer the contact time, the more serious the noise hearing damage.
2Side effects of drugs
It is not uncommon for the side effects of the drug to cause deafness. At present, there are more than one hundred kinds of drugs known to have ototoxic side effects, the most representative ones are aminoglycoside antibiotics, such as streptomycin, kanamycin, neomycin, gentamicin and the like. In addition, antimalarials, antineoplastic agents, analgesics, diuretics, etc. are all ototoxic drugs. Some individuals are particularly sensitive to certain drugs, although they can cause side effects of hearing damage within the scope of safe medication. Individuals with sensitivity to the ototoxicity of aminoglycoside antibiotics even present family concentration and genetic phenomena, and scientific research has also found susceptibility genes.
Sudden deafness is a common disease, manifested as a sudden onset of unilateral sensorineural deafness, most accompanied by tinnitus or ear swelling, sometimes accompanied by dizziness. A small number of patients are onset1A history of colds a month ago may be caused by a viral infection. Some patients are caused by insufficient blood supply to the blood vessels of the inner ear, which is more common in patients with underlying diseases such as hypertension, hyperlipemia, and diabetes.
There are many cases that are unexplained or caused by a variety of reasons. Regardless of the cause of the disease, it is important to see the doctor as soon as possible. When some patients suddenly have unilateral deafness, they tend to wait for observation, wait for a period of time, and then go to the hospital for treatment. This misses the timing of treatment and often does not achieve good results.
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