Children’s lack of clarity in speech may be caused by physiological reasons, short tongue tie, hearing impairment and other reasons. 1. Physiological reasons: when a child first learns to speak, the pronunciation is not yet accurate, there may be a temporary speech bite unclear phenomenon, which is a physiological phenomenon. 2. Tongue tie is too short: children’s tongue tie is too short is that after birth, the tongue tie does not retreat to the root of the tongue, causing the tongue can not stick out of the mouth, the tip of the tongue can not be upturned, and the biting of words is not clear in speech. 3. Hearing disorders: If a child has hearing disorders, such as deafness, hearing loss, etc., it will easily lead to inability to hear, inability to hear the sound of speech, and unclear speech bite. Children’s speech is not clear to rule out physiological causes, parents should take the child to the hospital in a timely manner, clear cause of the disease under the guidance of the doctor for standardized treatment.