Whether or not myocardial injury in children can heal on its own is related to the extensive degree of myocardial injury, light myocardial injury can heal on its own, while medium and heavy myocardial injury cannot heal on its own, and needs to follow the doctor’s prescription for standardized treatment. Myocardial injury in children is mostly caused by myocarditis due to viral, bacterial and other infections. In mild cases, there may be no symptoms at all, and the injury can be cured in a few weeks by strengthening nutrition, paying attention to rest, etc. to reduce the load on the heart and improve the function of the heart muscle. However, when myocardial injury is severe, it will lead to myocardial necrosis, cause myocardial pathological fibrosis, etc., and cannot be cured by itself. It should be treated with antiviral drugs such as acyclovir or anti-bacterial drugs such as penicillin under the supervision of a doctor. Adenosine triphosphate and other drugs to promote myocardial metabolism can also be applied under medical supervision for treatment. If a child has a myocardial injury, it is necessary to consult a doctor in time and follow the doctor’s instructions for standardized treatment, so as not to delay the condition and cause adverse consequences.