Traditional Chinese medicine believes that the heart of the feet when sleeping is hot and yin deficiency fire (Yin essence deficiency in the body, the emergence of excessive fire) related. Traditional Chinese medicine believes that under normal circumstances, the body’s yin and yang are in a relatively balanced state, when the body’s yin is deficient, the yang is relatively hyperactive, there will be a state of yin deficiency and fire. At night, when the yang enters the yin during sleep, and the yin is weak and unable to astringe the yang, there will be a state of heat in the palms of the hands and the hearts of the feet, which is also known as Wuxingxiahe (heat in the hearts of the hands and feet, and self-consciousness of the heart and chest heat). In addition, physiological conditions can also lead to heat in the center of the feet while sleeping, which is mostly related to the indoor environment and generally does not require treatment. Patients who suffer from heat in the center of the feet while sleeping are advised to go to a regular hospital and be treated under the guidance of a professional physician.