Recently, the first wave of COVID-19 infected people in many parts of the country has turned negative. However, the discussion about violent exercise or sudden death in the short term after rehabilitation has led people after "Yangkang" into a new round of worry. Can infection with COVID-19 cause viral myocarditis? What should we pay attention to after suffering from viral myocarditis? How long can I exercise after "Yangkang"? The reporter of Science and Technology Daily interviewed relevant experts for this purpose. Myocarditis is a rare complication after COVID-19 infection. In April this year, Circulation published a research report, which analyzed more than 56000 hospitalized patients with COVID-19 infection in 23 hospitals in Europe and the United States from February 2020 to April 2021. The results showed that for every 1000 infected people, 2.4 people were definitely or probably suffering from acute myocarditis, and 4.1 people were suspected of acute myocarditis. Therefore, myocarditis is considered as a relatively rare cardiovascular complication after COVID-19 infection. "Myocarditis refers to acute or chronic inflammatory diseases with localized or diffuse myocardium. Fulminant myocarditis is the most serious type of myocarditis. It has a rapid onset and rapid progression, which can lead to malignant arrhythmia and heart failure, and even sudden death in severe cases." Chen Yang, deputy chief physician of Cardiovascular Department of Sichuan People's Hospital, said that winter and spring are the high incidence seasons of myocarditis, Although the disease can occur at all ages, the young and middle-aged people who are usually healthy and have no basic organic diseases and those who have been tired for a long time are the people with high incidence of myocarditis. "A variety of factors can cause myocarditis, such as infection, autoimmune factors, etc. Among infectious factors such as viruses, bacteria, spirochetes, viral myocarditis is the most common, such as hepatitis virus, influenza virus, etc. may cause viral myocarditis." Chen Yang said that from a clinical point of view, infection with COVID-19 virus may indeed lead to myocarditis, However, the probability and severity of its leading to fulminant myocarditis need more research to reveal. After suffering from myocarditis, what problems should be paid attention to. Research shows that different from general viral myocarditis, there are more risk factors for myocardial injury after COVID-19 infection. Older, male, patients with basic cardiovascular disease, obesity, diabetes, hypertension, immunosuppression and serious systemic diseases are more likely to suffer from myocarditis after COVID-19 infection. In this regard, Zhang Ran, chief physician of the Cardiovascular Medicine Department of the General Hospital of the Chinese People's Liberation Army, reminded that people with the above risk factors need to do a good job in personal protection and try to avoid COVID-19 infection; If unfortunately infected, we need to be highly alert to the occurrence of viral myocarditis; In addition, we must adhere to the standard treatment of chronic basic diseases. "Symptoms of viral myocarditis vary greatly from person to person. Mild cases have no conscious symptoms, and severe cases can be manifested as severe arrhythmia, heart failure, cardiogenic shock, or even sudden death." Zhang Ran said that after infection with COVID-19, there are fever, fatigue, muscle soreness, nasal congestion, runny nose, sore throat, cough and other infection precursor symptoms. If chest tightness or chest pain, dyspnea, palpitations, dizziness Extreme fatigue and other symptoms, we need to be alert to the possibility of viral myocarditis. "In case of the above symptoms, timely