When myocarditis occurs, myocardial enzymes may take about 7-10 days to return to normal, and if the condition is severe, it may take about 1-2 months. Myocarditis sometimes has an acute onset, often with widespread inflammation of the myocardial tissue, causing severe damage to the myocardial tissue, resulting in a large release of cardiac enzymes into the blood. After 7-10 days of active treatment, the values of cardiac enzymes can gradually decrease and slowly return to normal. For patients with severe myocarditis, there may be autoimmune hyperfunction, and the abnormal elevation of myocardial enzymes may persist for a longer period of time, requiring 1-2 months of rest and recuperation before the values of myocardial enzymes can return to normal. After the occurrence of myocarditis, the abnormal elevation of myocardial enzymes often occurs, in the process of myocardial enzyme values gradually decline, it is necessary to rest in bed, and should be appropriate to strengthen the nutrition to promote the growth and recovery of myocardial tissues, so as to help the recovery of the disease.