Myocarditis is an infectious disease caused by viral infection leading to myocardial damage. Particularly extensive myocardial damage can pose significant risks to life and cause serious complications. Common complications include heart failure and arrhythmias, with severe cases possibly leading to sudden death. Therefore, patients with myocarditis must be hospitalized for treatment. Under the observation of doctors and nurses, effective rest can be ensured, and treatments such as antiviral and myocardial nutrition can be applied to prevent the occurrence of complications.