ADHD refers to Attention Deficit Hyperactivity Disorder in medicine. If a 4-year-old baby suffers from Attention Deficit Hyperactivity Disorder, he or she can be improved by medication, psychotherapy and general treatment. 1. medication: for children with attention deficit hyperactivity disorder, parents can follow the doctor’s instructions for children to take methylphenidate and other drugs, which can improve the attention deficit and impulsivity, hyperactivity. 2. Psychotherapy: For children with attention deficit hyperactivity disorder, behavioral therapy can be used to reinforce good behaviors and replace old bad behaviors with new good behaviors. Cognitive-behavioral therapy can also be used to help children recognize the appropriateness of their behaviors and to solve their impulsivity problems. 3. General treatment: For children with attention deficit hyperactivity disorder, parents should create a warm environment for them to grow up and avoid scolding them when they encounter problems. For 4-year-old babies with attention deficit hyperactivity disorder, parents are advised to take their children to regular hospitals for treatment under the guidance of doctors.