A 2 1/2 year old baby stuttering in speech is a relatively common physiological phenomenon, usually considered for reasons such as the baby’s young age, mental tension, complex language, and developmental stuttering. If the baby stutters, parents should avoid deliberately to correct, otherwise it is easy to make the baby anxiety, so that the stuttering situation aggravated. 1, the baby is young: may be due to the baby’s young age, can not be more accurate expression of their own will, they may appear stuttering; 2, mental tension: because the 2.5-year-old baby language function is not yet perfect development, if When the baby speaks nervous, or anxious, the speed of the brain to transmit information faster, the baby can not keep up with the speed of the brain to transmit information, there may be stuttering; 3, complex language: because the 2.5-year-old baby just began to speak, if you meet the more complex language or sentences, there will be stuttering or not fluent; 4, developmental stuttering. If a 2.5-year-old baby speaks normally and suddenly stutters, it is usually considered a developmental stuttering, which is also a common phenomenon, generally with the improvement of the baby’s language function and age, the above symptoms can gradually disappear.