How long it takes to recover completely from myocarditis is mainly related to the specific cause, the severity of the disease and the individual patient’s condition, and should be analyzed on a case-by-case basis, not as a generalization. In patients with mild symptoms, the heart muscle can recover after rest, a light diet, and quitting smoking and drinking, and can recover completely in about 3 months. Some patients with severe symptoms, on the other hand, may be left with sequelae such as arrhythmia and ventricular premature. In addition, once it leads to heart enlargement, heart failure or even explosive myocarditis, it can lead to the death of the patient in a short time. Therefore, severe myocarditis has diffuse damage and requires prompt treatment and rest after detection, with a long recovery time, usually more than 6 months, which varies from person to person. During treatment, patients with myocarditis should take bed rest, maintain a quiet environment, and eat a light diet. At the same time, care should be taken to avoid strain and keep warm to avoid recurrence of the disease.