From the perspective of traditional Chinese medicine, fear of cold is mostly a disease of qi and blood. If the patient's lung function is normal and his body temperature is regulated normally, there will be no such fear of cold and heat. If the patient's lung qi is insufficient and external work is insufficient, and the weather is hot, hot air will easily enter our body, that is, the function of lung coating is out of order, which finally leads to a symptom of being afraid of cold and heat.