Mental retardation can be improved through medication or rehabilitation. Mental retardation can be caused by congenital diseases, infections, intracranial hemorrhage, malnutrition, poisoning, cerebral infarction and so on. As a result, there are poor self-care ability, memory function decline, emotional instability, poor speech, serious distraction, slow perception of the surrounding things and other manifestations. 1. Drug treatment: such as piracetam tablets, pyrithioxin hydrochloride tablets and other drugs for treatment, can alleviate mental retardation, dizziness, swelling and pain, memory loss, poor concentration, emotional changes and so on. 2. Rehabilitation training: Rehabilitation therapy provided by doctors can be used to help patients maintain their memory as well as repair some of the deteriorated functions, which include improving cognitive understanding, improving language level, etc., so as to help realize self-care and alleviate the pressure from family and society. It is also necessary to develop good dietary habits in daily life, try to maintain balanced nutrition, eat more fresh vegetables and fruits, and replenish the trace elements and vitamins needed for physical development.