Why don't some 3- to 4-year-old children talk?

A 3- to 4-year-old child not speaking may be due to hearing impairment, abnormal vocal cord development, autism, or other causes.

1. Hearing impairment: If a child has underlying hearing problems, this can lead to difficulty in producing speech sounds and result in the inability to speak. It is important to undergo thorough hearing evaluations to determine if hearing loss is present, and appropriate treatments—such as cochlear implants—should be administered promptly.

2. Abnormal vocal cord development: When a child's vocal cords do not develop properly, it may cause abnormal airflow during phonation and difficulties coordinating speech production, leading to muteness. The child should be taken to an otolaryngology department at a hospital for timely evaluation, and a diagnosis should be made under medical guidance.

3. Autism: Children with autism often not only fail to speak but also show limited interaction with peers, exhibit rigid behaviors, and prefer solitary play. Under medical supervision, structured training tasks and activities can help these children acquire essential life and learning skills.

A 3- to 4-year-old child's lack of speech may also stem from intellectual disability. It is recommended to frequently communicate and interact with the child, create an environment conducive to language development, and encourage verbal expression. Taking the child to places where other children play can also stimulate their language development.