The severity of sinus arrhythmia cannot be generalized, it is closely related to the patient’s own underlying disease. In some people, sinus arrhythmia is related to breathing, so this kind of sinus arrhythmia does not need treatment, so don’t worry about it; if the examination reveals that there is an arrhythmia, but it is not more than 100 beats/min and not less than 60 beats/min, in fact, it does not need treatment, and it will not have any effect on the body. Therefore, sinus arrhythmia is not serious and has no obvious effect on the body and does not require treatment; however, if there is an underlying disease, such as heart disease and premature ventricular contractions, this is a much more serious situation; this is when the underlying disease needs to be treated. It is recommended that patients do not judge or diagnose on their own based on one result, but should consult a doctor in time, who will analyze the situation and make a clear diagnosis.