Many people often ask if my myocarditis is contagious. Actually, myocarditis is a focal inflammatory lesion of the myocardium or a diffuse inflammatory disease of the entire myocardium. It is an inflammatory disease of the myocardium. Based on the cause, we classify it into infectious and non-infectious types. The infectious type is mostly caused by viruses, such as Coxsackievirus B, or by bacteria, while non-infectious type is caused by allergies. Generally, they are not contagious.