Myocardial damage in newborns is serious. Cardiomyocytes are irreversible cells that cannot be regenerated after damage and should therefore be taken seriously. The first step is to identify the cause of the damage, which is often due to viral infection, cardiovascular abnormalities and congenital defects. It is recommended to improve the electrocardiogram, cardiac ultrasound, myocardial enzyme profile and other related tests in order to identify the specific heart lesions and then treat them symptomatically. Once serious myocardial damage occurs, arrhythmias, respiratory failure, heart failure, etc. may occur, and in severe cases may be life-threatening. Promptly hospitalize the patient, choose the correct treatment under the guidance of the doctor, maintain an optimistic attitude, actively communicate with the doctor in charge, and avoid excessive mental stress.