Yin deficiency and internal heat will appear as redness of the cheeks (reddish color of the cheekbones), night sweating (abnormal sweating after going to sleep and stopping after waking up), hot flashes (bursts of heat), emaciation, heat in the heart (heat in the hearts of the hands and feet, and self-consciousness of heat in the heart and chest), heat at night and cool in the early morning, and dryness of the mouth and throat. Yin deficiency and internal heat refers to the deficiency of yin and fluid that cannot control fire, resulting in symptoms of deficiency heat and fever. The most common symptoms are heat in the heart of the hands and feet, heartburn, night sweats, hot flashes, and yin deficiency of the liver and kidneys (deficiency of yin fluid in the liver and kidneys) sometimes accompanied by dizziness, lumbago, and dry eyes. Yin deficiency of the heart also manifests as palpitations (rapid heartbeat, often accompanied by panic), insomnia, irritability, heatiness, hot flashes and night sweats, which need to be treated by nourishing the yin, nourishing the heart and calming the mind. Stomach yin deficiency is characterized by noisy discomfort in the stomach and epigastric region (a feeling similar to hunger, emptiness and burning in the stomach), hunger pangs, inability to think about food and drink, hidden pain in the stomach, burning pain and distension, etc. The symptoms are treated by nourishing yin and nourishing the stomach. Symptomatic treatment is often done by nourishing Yin and nourishing the stomach. It is recommended that the corresponding symptoms of yin deficiency and internal heat promptly seek medical treatment under the guidance of the doctor’s diagnosis, so as not to delay the condition.