The heart rate of 100 beats per minute or more should be taken seriously as it may be caused by fever and viral myocarditis. Under normal circumstances, a person’s heart rate is 60 to 100 beats per minute, and it is a normal pathophysiological response to the increase in basal metabolic rate due to fever when you have a cold, which results in a faster heart rate. As the fever subsides, the heart rate will gradually return to normal. This condition requires close monitoring of temperature changes and antipyretic treatment if necessary. If the heart rate is still greater than 100 beats after the fever has subsided, especially when combined with chest tightness, shortness of breath and other discomforts, it is necessary to pay attention to it, which may be a manifestation of viral myocarditis, and it is necessary to consult a doctor as soon as possible to improve the relevant examinations, and at the same time to carry out symptomatic treatment. For the occurrence of heart failure, arrhythmia, etc., given cardiac, diuretic, vasodilator, antiarrhythmic drugs and other treatments. Therefore, if the heart rate persists for more than 100 beats, it is recommended to consult a doctor in time for standardized diagnosis and treatment.