March 3 is the 24th National Ear Protection Day, and this year's theme is "Ear protection in science and active health". For many people, wearing earphones anytime and anywhere has become the norm of life. Will this have a negative impact on hearing? In this issue of "One Minute Health Course", Wang Ning, director of the Third Ward of Otolaryngology Head and Neck Surgery of Hunan Provincial People's Hospital, explained relevant knowledge to netizens. Wang Ning said that the structure of the ear is precise and the function is complex. Compared with the hearing loss caused by other reasons, the damage caused by wearing earphones for a long time often has a strong "concealment" and is not easy to be detected. He stressed that long time, close distance and high decibel sound may cause hair cell fatigue in the inner ear and temporary hearing loss. In the long run, it will cause permanent damage to sensory cells and other ear structures, causing noise-induced deafness or hidden hearing loss, which can not be reversed once it occurs. "In addition, wearing earphones for a long time will make users with sensitive ear canal skin feel stuffy and blocked, and even induce eczema or inflammation," Wang Ning said. Wang Ning suggested that in daily life, wearing earphones should comply with the "60-60-60 principle", that is, the time of using earphones should not exceed 60 minutes, the volume should not exceed 60% of the maximum value, and the ambient noise should not exceed 60 decibels. Wang Ning reminded that you should not wear earphones in noisy environments, because in buses, subways and other environments, the background noise is loud. If you use earphones at this time, you will unconsciously increase the volume of earphones, affect your hearing, and easily bring traffic safety hazards. When selecting earphones, it is better to choose earmuff type. The stimulation to the external ear canal and tympanic membrane is small. The volume of earphones should be freely and flexibly adjusted. In case of excessive sound, it can be adjusted in time. When using earphones, pay attention to the regular cleaning and disinfection of earphones to prevent ear infection caused by earphone pollution. Finally, when the ear has tinnitus and other symptoms, we must seek medical attention in time and actively treat them. If the best window of treatment is missed or the treatment is improper, the hearing loss may be accompanied for life. (Xinhua News Agency)