Fear of cold at night may be caused by deficiency of yang qi, deficiency of lung yang, deficiency of kidney yang and so on. 1. Yang qi insufficiency: Usually, Chinese medicine practitioners believe that fear of cold at night is caused by yang qi insufficiency. If the patient’s body has insufficient yang qi, it is easy to have symptoms such as fear of cold and cold at night, especially when sleeping. 2. Lung yang deficiency: If the body is afraid of cold, it may also be due to the deficiency of yang qi in the lungs, which mainly refers to the deficiency of lung yang and the fear of cold. 3. Kidney yang deficiency: If the patient is afraid of cold at night, it is mainly caused by the deficiency of yang in the body, especially kidney yang deficiency. There are many other reasons why people are afraid of cold at night, so it is recommended that patients seek medical treatment in a timely manner and under the guidance of a doctor to carry out regular treatment.