Stuttering in a three and a half year old child is also known as stuttering and may or may not be normal. Normal stuttering can be caused by nervousness or illness. If it is caused by word limitations or emotional tension, there is usually no need for special treatment, and correct guidance can be given to improve the baby’s emotions and habits. Abnormal stuttering can be caused by diseases, such as brain infection, etc., and requires systematic treatment after seeking medical advice. A three-and-a-half year old child is in the early stages of learning to express his/her language. When faced with some situations, he/she may experience tension and anxiety due to a lack of vocabulary to express himself/herself, which may cause stuttering at this time. This may cause stuttering. At this time, you should calm the child and help him or her express his or her inner thoughts, which may slowly ease the stuttering. If the stuttering is caused by a medical condition, such as a brain infection, or a head injury, the stuttering should be treated promptly. If the stuttering is caused by certain diseases, such as brain infections or head injuries, the stuttering should be treated promptly and systematically under the guidance of a doctor, and the stuttering phenomenon will be alleviated accordingly when the diseases are cured. It is important to note that when a child is found to stutter, it is important to consult a doctor to diagnose and clarify which cause is responsible. In daily life, we should avoid teasing and imitating the stuttering behavior of the child, give the child a pleasant and relaxing environment, and consult a professional psychologist if necessary.