High lymphocyte percentages in infants indicate the presence of a viral infection, and sometimes a child will have high lymphocytes in the early stages of an illness or when a viral infection is underway. When pediatric lymphocytes are high, it is important to note if the child has fever, cough, phlegm, sore throat, throat discomfort, poor eating, or if he or she has a depressed mental state, or nausea, vomiting, or diarrhea. When the lymphocyte percentage is high, it usually manifests as the above respiratory or digestive tract abnormalities. If the child only has a high lymphocyte percentage alone, without any clinical phenomenon, parents can pay attention to pediatric care, pay attention to warmth, pay attention to diet, to avoid further aggravation of respiratory or digestive system diseases.