When the patient is afraid of cold in summer, it is usually considered to be caused by Yang deficiency. Yang deficiency is mainly related to diet, living in cold places for a long time, and old age and chronic illness, and may also be caused by a poor innate constitution. In addition to fear of cold, there are also symptoms such as long and clear urine and pale face. Yang deficiency is usually referred to as Qi deficiency or Vital Fire Failure (weakness of the kidney yang in the body, which reduces the function of warming and promoting the flow of qi and blood), because Qi and Vital Fire are both yang. Lung is the main qi, qi deficiency is mostly due to lung qi deficiency or lack of qi in the middle (spleen and stomach qi weakness), and thus the surface qi is not solid, so the external cold; yang deficiency is yin, so the fate of the fire failure is also mostly seen in the function of the exhaustion of the disease. In addition, heart yang deficiency, spleen yang deficiency also belongs to the category of yang deficiency. Generally, the symptoms are cold, cold limbs, tiredness and weakness, and weak pulse. When the patient has the manifestation of coldness in summer, it is recommended that the patient go to the hospital in time and follow the doctor’s instructions for treatment.