I have been practicing audiology for almost thirty years. In the past, when dealing with the cause of a deaf child, we would always ask the child when the child became deaf and what the cause was, such as whether the child had used ototoxic drugs, etc. If the child must have used aminoglycosides after a high fever, we would give a conclusion that the child was drug deaf! There is no way out, so if there is residual hearing, the child is given a hearing aid. In later follow-ups, I gradually had difficulty interpreting the results of some tests of audiology. For example, the low frequency hearing had a bone and air conduction difference, while the middle ear analysis was an “A” pattern, sometimes leading to acoustic reflexes. In the future, I would find that some children had a fire, high activity, high fever, or head trauma, which could cause dizziness, hearing fluctuations, or even hearing loss. High sound intensity stimulation of the auditory evoked potentials results in a characteristic deep cut between waves 1,3. In the first cochlear implant surgery at our hospital, a “blowout” occurred, telling us that the child had a large vestibular aqueduct. In the future, when I adjust the gain of my child’s hearing aids, I am careful to take into account the child’s tolerance for sound. I would prevent the child’s dizziness and hearing loss due to uncomfortable sound stimulation. Later, as the parents’ financial situation improved, we recommended that the child have a high-resolution CT examination: or, if the child had a rapid hearing loss due to high fever, shock or trauma, we had to do an imaging examination for him/her. It turned out: almost, the children I intervened in front of (the oldest was 26 years old) and most of the infants and toddlers identified by the recent screening, had a large conductive ductus in varying degrees. And the diagnosis we were used to – drug-related deafness should be reacquainted!!! In some children, even though no hearing problems have been detected, we instruct parents to pay close attention to prevent trauma and high fever in their children. Once hearing abnormalities are detected. The first time to find us. Often with proper and timely treatment, hearing can be restored to its pre-onset state. 09, one of our little affected ears had a hearing of 30 and 65 decibels at the three-month hearing screening. The child’s parents came to the hospital at 8 months of age and asked for a follow-up exam. I was surprised by the results. Both ears were completely deaf. When asked about the cause, the child had fallen out of bed 10 days ago and had a 4*6 hematoma on his head. I found the waveform of brainstem electricity at three months, and that deep large cut appeared in front of me. I was so distressed! If, we had warned the parents in time, we might have avoided what happened today. If, the child had been treated promptly after the trauma, the hearing wouldn’t be what it is today!!! Today, we all take this problem very seriously. The causes of deafness are clearly identified and the deterioration of deafness is avoided. I am writing this to you today as a reminder to our peers, and parents of children, to pay attention to this prevalent problem. Timely prevention and treatment are needed to prevent the occurrence and worsening of deafness.