Symptoms of myocarditis caused by a cold can be mild or severe. Mild myocarditis can be asymptomatic, but in severe cases heart failure and arrhythmias can be present. The determination of whether myocarditis is caused by a cold can usually be based on obvious triggers, symptoms and auxiliary tests. The main clinical symptoms are elevated body temperature, headache, dizziness and runny nose. If patients do not take timely and effective treatment, the recurrence of colds, due to overwork, viral invasion, decreased body resistance and other reasons, will increase the risk of viral myocarditis. The early clinical manifestations of patients with myocarditis complicated by a cold are similar to those of the common cold, without obvious “heart disease” symptoms, mainly manifesting symptoms such as fever, nausea, vomiting, sore throat, weakness, sleepiness, loss of appetite, etc. Some patients are accompanied by diarrhea and other gastrointestinal discomfort. With the gradual development of the disease, patients will show shortness of breath, chest tightness, panic, dizziness, dizziness and other manifestations, and serious patients will feel the pulse “missed jump, heartbeat to the throat, heartburn” and other feelings. The patient’s myocardial edema can also be clearly displayed. 2. ECG: Using ECG and dynamic ECG for auxiliary examination, various arrhythmias and myocardial ischemia can be observed, especially ventricular premature beatings, cardiovascular disease, and myocardial ischemia. patients with ventricular premature beats, atrioventricular block, etc. 3. The diagnosis of myocarditis should exclude other causes of myocardial lesions.