The occurrence of alternating pulses is related to the alternating strength of left ventricular contraction, suggesting myocardial injury and failure, and is strong evidence of occult heart failure. Some people propose that the weak beat is caused by a decrease in the number of myocardial fibers participating in ventricular contraction, when part of the heart is in a relative non-response period, and in the next beat, all myocardial fibers contract, thus producing a strong pulse. Other people propose the explanation of unequal ventricular diastolic degree, that when the heart is filled with more blood volume, then its beat is enhanced, and vice versa is weak, and when the strength and weakness are alternated, then it is alternating pulse. In winter, you should not just take the wind and not the temperature, but pay attention to keeping warm and avoiding colds. Fever, anemia, hyperthyroidism and other diseases, must be promptly to the hospital, early detection, early diagnosis, early treatment, do not stay at home to avoid treatment. If organic diseases are ruled out, you can also consider traditional Chinese medicine to find a qualified Chinese medicine practitioner to prescribe the right Chinese medicine after identifying the evidence. And it is necessary to adhere to the treatment and regular checkups.