The dryness and heat in the palms and feet may be caused by physiological factors or pathological reasons such as Yin deficiency and internal heat. 1. Physiological reasons can be seen in the weather is too hot, or night clothing is too much too thick, etc.. 2. Yin deficiency and internal heat are usually related to a deficiency of yin and fluid, and the failure of water to control fire. From the perspective of Chinese medicine, yin deficiency refers to a deficiency of yin fluid in the body, which is unable to restrain yang, and yang qi is overbearing, thus making it easy for internal heat to develop. Patients with yin deficiency and internal heat usually have hot and dry palms and feet. In addition, yin deficiency and internal heat will have an impact on the patient’s mood, which will easily lead to the patient’s irritability, and the yin deficiency disturbs the mind, which may affect the quality of sleep at night, thus making it impossible to sleep. If the patient has the situation that the palms and feet are hot and dry and can’t sleep, he should consult a doctor in time to clarify the cause and be treated under the guidance of the doctor.