Cold feet when sleeping at night may be related to the surrounding environment, or it may be caused by some pathological factors, such as yang qi deficiency. 1. Surrounding environment: Cold feet can occur when the surroundings are cold at night when you sleep, or when your feet are not well covered by the blanket. In this case, you just need to pay attention to keep your feet warm. 2. Yang Qi deficiency: Yang Qi has a warming effect on the human body, when the body is deficient in Yang Qi, can not be warmed, there will be cold, cold limbs, diarrhea and other symptoms, you can take the role of warming the role of traditional Chinese medicine or Chinese patent medicines for diagnosis and treatment. There are many other causes of cold feet sleeping at night, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, to avoid blindly using their own medication.