People often say, “A dragon is born of a dragon, a phoenix is born of a phoenix, and a mouse’s son will make a hole”, so it is logical to assume that deaf children are usually born into deaf families. Is this really the case? In fact, about 60,000 new deaf people are born every year in China, including congenital deafness, delayed deafness and drug deafness. 60% of deafness is caused by genetic factors, and hereditary deafness is caused by genetic and chromosomal abnormalities, which are inherited from parents’ genetic material. This is very different from the traditional belief that deaf children are mainly born to deaf families. Why is it that the majority of children with hereditary deafness are born to normal hearing couples? One out of every 16 people with normal hearing is a carrier of the deafness gene mutation. Take autosomal deafness as an example: a couple with normal hearing parents who carry the same deafness gene has a 1 in 2 chance of passing the deafness gene to their child, who will be a carrier of the deafness gene mutation; a 1 in 4 chance of having a deaf child; and a 1 in 4 chance of having a completely normal child. Some of the more common forms of inherited deafness are “slap deafness” and “one shot deafness”. Slap on the wrist: Children with slap on the wrist deafness are carriers of the deafness gene mutation and develop large vestibular canal syndrome. They are highly sensitive to shock: deafness can be triggered by a bump on the head, being thrown from a height as a toddler, being slapped, being exposed to loud sound decibels, colds, fevers, etc. One-shot deafness: One-shot deafness in children with drug-sensitive genetic mutations can lead to severe deafness or even one-shot deafness with the use of aminoglycosides. It is well known that all 21 performers of the Spring Festival Gala dance “A Thousand Hands Guanyin” are deaf, and 18 of these performers are deaf due to medication, and most of them were deaf due to antibiotic use during early childhood due to fever. Deafness is a pain that parents and families cannot relieve, so it is important to carry out deafness genetic testing among people with normal hearing to figure out the cause of deafness for deafness prevention and control.