Cold and hot feet are generally related to external factors and vascular diseases. 1. External factors: due to low temperature, wearing too thin or large temperature difference between indoor and outdoor, it is easy to show the condition of cold and hot feet. 2. Vascular diseases: due to poor blood flow in local tissues of the lower extremities, the lower extremities appear cold and hot symptoms, as well as local skin color darkening, dark tongue coating, sunken pulse and other symptoms. It is recommended to go to the hospital for timely examination to clarify the cause of the disease if the symptoms of cold and hot feet occur frequently. In life, pay attention to maintain regular habits, moderate consumption of fruits and vegetables, under the guidance of a physician to use traditional Chinese medicine foot soak, moderate consumption of brown sugar and ginger soup, etc., can help improve the condition of feet cold and hot.