Children may experience digestive discomfort during illness, along with symptoms such as listlessness, drowsiness, and others. If these symptoms do not persist for a long time, they are typically not considered clinically as indicative of heart damage or myocarditis. In such cases, it is advisable for the child to rest at home, consume a light and liquid diet, and wait for recovery from the illness, which will naturally improve their spirits. However, if a child has a cold with extreme listlessness and feels very uncomfortable, it may be necessary to conduct a detailed blood test in a hospital to determine if there is any heart damage, myocarditis, or other special conditions. In principle, medical intervention with medications may be necessary for healing when required.