It needs to be judged according to its own symptoms, etiology and so on. Yin deficiency is mainly a deficiency of yin fluid, which makes it difficult to control the yang, resulting in the symptoms of deficiency heat. Clinical symptoms include thinness, hot flashes (a burst of fever), bone vapor, dry mouth and throat, heat in the hands and feet, short and red urine (small amount of urine, dark yellow color), dry stools, red tongue with little moss, and a fine pulse (the pulse becomes narrower and finer, and the rate is faster), etc. Yang deficiency is mainly a deficiency of yin, which makes it difficult to control yang. Yang deficiency is mainly a deficiency of yang qi, which makes it difficult to control yin, resulting in the symptoms of coldness. Clinical manifestations include coldness (fear of cold, cold limbs), lack of thirst or thirst for hot drinks, lack of energy, loose stools, long and clear urine, pale tongue and weak pulse. If you feel unwell, please seek medical advice immediately.