In viral myocarditis, mostly caused by cold, such as influenza virus, adenovirus, coxsackievirus, etc., the virus is very affectionate to cardiomyocytes, and after the virus invades the body, it first burrows into the tissue cells of the respiratory and digestive systems to multiply its offspring, and at the same time, through the blood circulation to the cardiomyocytes of the heart, it replicates in the cardiomyocytes, leading to cell lysis and death, causing diffuse inflammation and necrosis of the myocardium, with Acute heart failure and cardiogenic shock, various types of arrhythmias. If myocarditis is not cured in a short period of time, it may enlarge the heart and turn into chronic myocarditis. The stronger the immunity of young adults, the more violent this myocardial immune response is, and the greater the probability of myocarditis after a cold. Many factors are causative factors of myocarditis, and young people should actively prevent it. Including: 1, staying up late to damage the body’s immunity, etc. 2, insufficient intake of protein and other nutrients. To eat more fruit, the body’s vitamin C content is high, white blood cells are more active, the ability to remove pathogenic bacteria is strong. 3, after the cold strenuous exercise, so that the body metabolism more vigorous, energy material nutrients consumed too much, the body will appear immune suppression, resulting in more viruses with the blood flow to the heart, so that the virus in the myocardium reproduction replication intensified, resulting in myocardial inflammation and necrosis, prone to sudden cardiogenic death. After the cold must be well rested, rest and sleep is the anti-cold “elixir”. 4, to pay attention to cold treatment, early application of antiviral drugs, myocardial nutrition drugs.