Cold legs and feet at night can be caused by kidney yang deficiency (lack of yang energy in the kidneys) and cold attack. Kidney yang deficiency caused by men sleeping at night cold legs and feet, often accompanied by lumbar and knee soreness (waist and knee soreness and weakness) cold pain, impotence, premature ejaculation, or stool for a long time more than leakage, stool in the undigested food, abdominal pain and diarrhea, pre-dawn pale or dark, afraid of the cold and other symptoms. Men who sleep with cold legs and feet at night, often accompanied by cold (fear of cold), head and body pain and other symptoms. If the symptoms of cold legs and feet at night are not relieved for a long time or accompanied by other discomforts, consult a doctor in time to identify the cause and carry out targeted treatment.