Under normal circumstances, children do not need to eat lysine, lysine belongs to the alkaline essential amino acids, need to be obtained from food, normal daily life of young children have already satisfied their own nutrition, do not need to supplement lysine. Lysine belongs to the synthesis of protein important amino acids, generally can be ingested from food, such as livestock and poultry lean meat, fish, shrimp, crab, shellfish, eggs and dairy products, in general, the daily diet can meet the needs of young children on lysine, under normal circumstances do not need additional supplement lysine. Lysine drugs are mainly used in the treatment of craniocerebral trauma, chronic ischemic and hypoxic diseases of brain tissue. Young children should not use lysine arbitrarily under normal circumstances. When illness occurs, they should consult a doctor in time and be treated under the guidance of a doctor, paying attention to the dietary matching and paying attention to the dietary habits.