Yin deficiency is generally known as yin deficiency in Chinese medicine, which is usually manifested as flushing, dry throat, five heart-heat (heat in the hearts of the hands and feet, and self-consciousness of the heart and chest), hot flashes and night sweating (sweating abnormally after going to sleep, and sweating stops after waking up), etc. However, since there are different types of yin deficiency, the manifestation of the symptoms will also be different as follows: 1. Heart Yin Deficiency: Patients with Heart Yin Deficiency will have symptoms such as heart palpitations, insomnia, insomnia, dry mouth and throat, hot flashes and night sweats, fever in the hands and feet, and emaciation. 2. Lung Yin Deficiency: Patients with Lung Yin Deficiency will have dry cough without phlegm, little and sticky phlegm, blood in phlegm, hoarseness, dry mouth and throat, and no heart heat. 3. Liver Yin Deficiency: Patients with Liver Yin Deficiency usually show symptoms such as dizziness and headache, dry eyes and fear of light, impatience and irritability, blurred vision, flushed cheeks and dry red tongue. 4. Kidney Yin Deficiency: Patients with Kidney Yin Deficiency usually show symptoms such as dizziness and tinnitus, soreness and weakness of the waist and knees, loose teeth, disintegration (excessive menstrual flow or dribbling), insomnia, forgetfulness, and dryness of the mouth and throat. As the symptoms of yin deficiency are more, so when the patient appears related to the discomfort, it is recommended to go to the hospital in time for examination and diagnosis, to clarify the type of pathology and then take targeted treatment measures, to avoid misunderstanding of the condition caused by the serious impact.