Reddish-red tongue can be seen in yin deficiency and fire exuberance (deficiency of yin and essence in the body, resulting in hyperactivity of deficiency and fire), and heat in Ying and Blood, etc. It can be treated with Zhi Bai Di Huang Wan, Huanglian and Agaricus Tang, Baihe Gu Jin Tang, Yi Stomach Tang, Qing Ying Tang, and Rhinoceros Horn and Di Huang Tang and other traditional Chinese medicines. 1. Yin deficiency with fire is characterized by dizziness, tinnitus, lumbar and knee soreness (a feeling of soreness and weakness in the lumbar and knee areas), bone vapor and hot flashes (a burst of heat, feeling that the heat is coming from inside the bone to the outside), night sweating (abnormal sweating after going to sleep, but sweating stops after waking up), spermatorrhea, etc. It belongs to the person who has a deficiency of kidney yin with fire and can be treated with Zhi Bo Di Huang Wan. For symptoms such as coughing and wheezing, blood in sputum, dry and sore throat, red tongue with little moss, etc., it is a deficiency of lung and kidney yin, and can be treated by adding subtractions to Baihe Gujin Tang. For symptoms such as loss of appetite, dry mouth and pharynx, red tongue with little moss, etc., stomach yin deficiency is the main cause, and can be treated by adding or subtracting Yiqi Tang. 2. Clinical manifestations such as body heat at night, disturbed spirit, little sleep, delirium (babbling), thirst or no thirst, vague macular rash (slight macular rash on the skin), fine pulse (pulse becomes narrower and finer and the rate is accelerated), and reddish-red tongue with dryness, etc., belong to the symptoms of heat entering into the camp, so it can be treated with the addition of subtraction of Qing Ying Tang. If there are symptoms such as heat disturbing the mind and spirit, delirium with fever, red tongue and thorns, fine pulse, or heat injuring the blood, purple and black spots, vomiting blood, epistaxis, blood in stool, blood in urine, etc., it belongs to heat entering into the blood compartment (among the four periods of Wei Qi and Ying Blood of warm disease, it belongs to the most in-depth stage or location of the disease), and it can be treated by adding or subtracting Rhinoceros Jiao Dihuang Tang. Adverse effects and contraindications of the above drugs are not clear, need to be used under the guidance of a doctor to identify the evidence, if any discomfort to consult a doctor in time, do not take medication without authorization.