Women who are afraid to sleep cold at night may be caused by physiological factors such as cold environment or slow blood circulation and weak metabolism. 1. Physiological factors: Under the condition of cold environment or cold weather, the efficiency of heat production of women is lower than the efficiency of heat dissipation, then there will be a lack of heat in the body, and the symptom of coldness will appear. Timely addition of clothing or improvement of ambient temperature can alleviate the symptoms. 2. Pathological factors: due to anemia, low blood pressure, chronic wear and tear disease or insufficient heart function, resulting in slow blood circulation, the body’s metabolism is weak, the body can not produce a large amount of heat in the evening when sleeping, the symptoms of chills will occur. If the symptoms of cold sleep appear for a long time, it is recommended to go to the hospital for examination in time to clarify the cause of the disease, and actively treat it to avoid aggravation of the disease.