A three and a half year old child who has difficulty in spitting out words may have abnormal development of the relevant parts of the mouth, and it is advisable to go to the hospital to have the development checked. Under normal circumstances, infants can understand their own names at 6 to 7 months of age, can speak simple words at the age of 1 year, and at the age of 3 years, can already point to the names of many items and say short sentences consisting of 2 to 3 words. If at 3.5 years old, the child still has difficulty in spitting out words, it may be that the usual training is less, and more pronunciation training should be conducted to encourage the child to speak. In addition, slurred speech may also be related to structural abnormalities in the oral cavity. Such as cleft palate, oral muscle dysfunction, tongue tie is too short, vocal polyps and other diseases. Therefore, if your 3.5 year old baby can’t speak clearly, it is recommended to go to the hospital for examination. If it is diagnosed to be caused by similar reasons, it should be treated as soon as possible, so as to avoid missing the best time for language development.