Acute myocarditis is an immune inflammation caused by viral infections, commonly occurring within two months after a viral infection. Treatment mainly involves symptomatic and supportive care, maintaining nutritional balance, supplementing vitamin C, resting, actively preventing colds, and the use of antiviral medications. Antibiotics should be used when there is a bacterial infection. Generally, myocarditis can heal, especially in patients with mild symptoms, typically recovering within three to four weeks. For those with myocardial infarction associated with inflammation or enlarged heart attack, rest is recommended for six months to a year until clinical symptoms completely disappear and the size of the heart returns to normal.