A 4-year-old child’s unclear speech may be due to hearing abnormality, short tongue tie, delayed speech development, etc. Depending on the cause, hearing aids and surgical treatment can be taken. 1. Hearing abnormality: hearing abnormality may lead to unclear speech, it is recommended to take the child to the hospital for hearing test, diagnosed with hearing abnormality, can follow the doctor’s advice to wear hearing aids or cochlear implants. 2. Short tongue tie: A short tongue tie can lead to difficulty in articulation, and the child may not be able to speak clearly when pronouncing the curled tongue. It is recommended to go to the hospital for relevant examinations, and if necessary, the child can be treated by tongue tie incision surgery. 3. Delayed language development: If the child’s language development is delayed, he or she may not be able to speak clearly. Parents can slow down the speed of speech, more communication with the child, patient guidance. There may be other reasons why a 4-year-old child’s speech is not clear, such as mental retardation, etc. It is recommended to consult a doctor in a timely manner to clarify the cause of the disease and treat the symptoms.