Expressive language disorders are developmental language disorders, which are language disorders caused by developmental delays. Expressive language disorders are not due to hearing impairment and are the result of organic damage to the central nervous system and severe mental retardation. Expressive language disorder is a specific disorder of language development in which the child’s ability to use expressive spoken language is significantly below the level expected for his or her intellectual age, but comprehension of language is normal. Children with expressive language disorders often do not know how to express their thoughts, even in non-verbal ways such as gestures. It may be accompanied by dysarthria, learning disabilities, inattention, and impulsive, aggressive behavior. Patients with expressive language disorder should be intervened at an early stage and rehabilitated under the guidance of a doctor. Parents should communicate with their children more often to promote the improvement of their language function and increase their fluency.