Colds are the most common respiratory infections and can be caused by a variety of viral infections. Because colds are so common, and because most patients recover spontaneously in a few days to two weeks, they are not easily taken seriously. In fact, colds can sometimes have many complications, especially because they can be a precursor to other diseases. For example, when viral myocarditis first develops, it only shows general cold symptoms such as fever, headache, body aches, sore throat, cough, etc. It takes about 1 to 3 weeks for chest tightness, palpitations, chest pain and other discomforts to appear, and at this time, if you go to the hospital for examination, you may find that there is heart enlargement, electrocardiogram may show arrhythmia, myocardial damage, and blood tests may show elevated blood sedimentation and elevated glutamic transaminase activity. Due to current technical limitations, the diagnosis of viral myocarditis now relies on medical history, clinical symptoms, signs, electrocardiogram, X-ray fluoroscopy and enzymatic tests. In addition to cardiac symptoms such as chest tightness and palpitations, most patients with viral myocarditis often have significant general weakness, easy sweating, dizziness, and shortness of breath from mild activity; a few patients with severe disease may experience severe arrhythmias, heart failure, cardiogenic shock, or even sudden death. Therefore, anyone who has palpitations, chest pain, chest tightness, shortness of breath, fatigue, dizziness and other uncomfortable symptoms within a short period of time after a cold should be alerted to the possibility of myocarditis and should not take it lightly, and should seek early medical attention. As there is no specific treatment for viral myocarditis, the efficacy of various anti-disease drugs is not certain, and symptomatic treatment is generally used. The actual fact is that you can find a lot of people who are not able to get a good deal on this. The most important treatment for viral myocarditis is rest. Animal experiments have proved that let the virus infection of mice caused by myocarditis, if it is driven to non-stop activity, the result is almost none spared death; while if given rest, most can continue to survive. This shows that rest is important for the prognosis of viral myocarditis. If the acute phase is not well rested, some can be left with sequelae such as premature beats, and a few can migrate to chronic cardiomyopathy. Therefore, it is important to be alert to chest tightness and palpitations after a cold and go to the hospital for further examination as soon as possible, and do not take it lightly as a common cold. In order to prevent viral infection and reduce the incidence of myocarditis, physical exercise should be emphasized to increase the ability of the heart muscle to resist pathogenic factors. Daily life should pay attention to the combination of work and rest, reasonable nutrition, to ensure adequate vitamins, especially rich in vitamin B1 and C.