Kidney yang deficiency refers to a series of symptoms manifested by the deficiency of yang energy in the kidneys. Kidney yang deficiency is usually caused by factors such as aging, overwork or injury to the kidneys due to prolonged illness. Clinically, coldness, fatigue (mental exhaustion and physical weakness), cold hands and feet, long and clear urine, cold limbs, etc. are common manifestations, and in severe cases, infertility may also occur. Chinese medicine believes that the kidney is the main water, yang mainly plays a role in promoting the operation of the blood, kidney yang on the role of water vaporization and transpiration, if the kidney yang is insufficient (lack of yang in the kidneys), transpiration and vaporization of the powerlessness, there will be a clear and long urination, cold and other manifestations. Patients with kidney yang deficiency need to pay attention to eating foods that can tonify the kidneys and strengthen yang (tonifying kidney yang), warming qi and blood, such as beef and mutton, oysters, etc., and avoid eating foods that are cold in nature. If the symptoms of kidney yang deficiency are more serious, you should go to the hospital in time and take medication under the guidance of a professional Chinese medicine practitioner.