Hypo-intelligence is a condition in which a person’s IQ is below 70 or 75 and is significantly below average. Children with hypo-intelligence can be significantly behind normal in several ways. First of all, the social adaptation ability is particularly poor. Smaller children cannot communicate and play well with children of the same age, older children are not able to integrate well into society, school-age children cannot study or go to school normally, children have poor learning ability, memory imitation or learning ability logical calculation ability are poor. In other words, the child cannot live like a normal child, and as the child grows up, he or she will be an intellectually disabled person in adulthood. At the same time, the child’s emotional intelligence and self-management ability are also particularly poor, usually hyperactive and easily irritable, sometimes hitting and damaging others, and some children with mental retardation have some social problems. Some babies with congenital mental retardation have special facial features, such as the typical appearance of children with congenital stupidity. Children with mental retardation have poor language development and are unable to communicate normally. Children with mental retardation also have delayed motor development, and their motor development is later than that of normal children of the same age. When a child shows any of these signs, parents must use these symptoms to determine if the child is mentally retarded. If you suspect that your child is mentally retarded, you must take your child to the hospital for an examination in a timely manner.