The child may speak early or late, and at the age of two, he or she may not be able to speak. If the child’s degree of speech is far from that of children of the same age, he or she needs to be examined, and neurology can be examined to see if there are any diseases of the central nervous system, and ENT can also be examined. The anatomical conditions in the oral cavity are abnormal, not so much as to cause the phenomenon of not being able to speak. The oral environment, such as the short tongue tie and incomplete closure of the frontal eye, appears that the child can speak but the voice is unclear, so the situation of not being able to speak can be considered neurology or otorhinolaryngology visits for review.