For patients with myocarditis, they may experience palpitations, chest tightness, difficulty breathing, various arrhythmias, and edema, and even fainting or sudden death. If the diagnosis of myocarditis includes these conditions, one to three weeks prior to the onset, the patient might have symptoms of viral infections, such as nausea, vomiting, and other gastrointestinal symptoms, or may have fever, general fatigue, muscle soreness, and other discomforts. However, not all cases of myocarditis will have symptoms of nausea, and nausea is not necessarily indicative of myocarditis, therefore there is no inevitable link between the two.