Hearing problems in babies of several months old are generally better diagnosed and treated. Common diagnostic methods include otoacoustic emission, auditory brainstem response, and treatments include cochlear implantation or wearing hearing aids. 1. Diagnosis: Otoacoustic emission tests are often performed 3-5 days after birth. If there is any abnormality in the screening test, otoacoustic emission or auditory brainstem response test should be performed at 42 days and 3 months after birth, which can generally determine whether the baby’s hearing function is normal or not; if the baby fails to pass the screening test several times, CT of the temporal bone and other tests should be perfected to make a joint diagnosis. 2. Treatment: When hearing screening and imaging tests reveal hearing problems and mild to moderate hearing impairment, suitable hearing aids can be chosen; if there is severe hearing loss, cochlear implants need to be implanted surgically, and speech training is needed to alleviate the problem of hearing loss. In conclusion, when hearing problems occur, it is recommended to consult a regular hospital in time for a clear diagnosis and active treatment.