The difference between yin and yang deficiency is that the patient’s symptoms can vary, mainly in the cold and heat properties of the disease. Yin deficiency and yang deficiency are TCM concepts of disease mechanism, and they will manifest as different symptoms when they appear in the human body. Yin deficiency is due to the damage of yin fluid, resulting in the function of yin fluid to restrain yang heat is reduced, so the patient will appear in the face of flushing, dry throat, five heart heat (two hands and two feet of the heart of heat, and self-consciousness of the heart and chest heat), hot flashes (bursts of heat), night sweats (after going to sleep sweat abnormally, wake up sweating stops) as the main symptoms, clinical symptoms depending on the different organs will be different. Yang deficiency is caused by a lack of yang qi and a decrease in the warming function, which leads to a series of symptoms mainly including fear of cold, low temperature of the hands and feet, mental fatigue, lumbar and knee soreness (a feeling of soreness and weakness in the lumbar and knee areas), and edema. If you want to treat yin and yang deficiencies, you need to consult a Chinese medicine hospital and follow the doctor’s instructions for standardized treatment after identification by a Chinese medicine practitioner.