Symptoms of yin deficiency differ from those of yang deficiency, so they can be judged by their manifestations. Yang deficiency is generally characterized by coldness, long and clear urination, and a white complexion, while yin deficiency is generally characterized by dryness of the mouth and throat, heat (heat in the palms of the hands and the hearts of the feet, and self-consciousness of heat in the heart and chest), and hot flashes and night sweats (abnormal sweating after going to sleep, but sweating stops after waking up), etc. Yang deficiency implies a deficiency of yang qi. Yang deficiency means loss of yang qi, which is mainly manifested as coldness and coldness of limbs, accompanied by symptoms such as long and clear urination, white color, pale mouth and thirst, and preference for hot beverages. Yin deficiency means a deficiency of Yin fluid in the body, which is mainly manifested as dryness of the mouth and throat, heat in the heart, hot flashes and night sweating, accompanied by short and yellow urine, dry and knotty stools, and a red tongue with little fluid. Severe Yang deficiency can be treated with medicines such as Baoyuan Tang, Radix Rehmanniae Tong, Right Angelica Pill, etc., while severe Yin deficiency can be treated with medicines such as Tianwang Tonic Heart Dan, Sha Shen Maidong Tang, Liver Replenishing Tang, etc. It should be noted that it is not recommended to judge yin deficiency and yang deficiency by oneself, and it is recommended to consult a doctor for medical consultation and treatment, and the specific medication should be under the doctor’s guidance of identification.