The clinical significance of a red tongue without moss is that the heat has entered the blood (in the four periods of warm disease, Wei Qi and Ying Blood, it is the deepest stage or disease position) or the yin deficiency and fire exuberance, and the elderly who have this appearance are mostly considered to be yin deficiency and fire exuberance. The symptoms of Yin deficiency and fire exuberance (deficiency of Yin essence in the body and hyperactivity of deficiency fire) are usually manifested as emaciation, flushing of cheekbones (redness of the cheekbones on both sides of the face), hot flashes (a burst of heat), night sweating (abnormal sweating after going to sleep, and stopping of sweating after waking up), five heartburns and heat (fever in the hearts of the hands and feet, and self-consciousness of the heart and chest), dryness of the mouth and throat, a red tongue with little fluid and less moss, and a thin and countless pulse (the pulse is narrow and thin and the rate is accelerated). (pulse becomes narrower, thinner and faster), etc. The appearance of yin deficiency and fire may be due to excessive emotions, fire evil injury to yin; or due to the late stage of fever, depletion of yin; or over-service of warm and dry products, dark depletion of yin; or room and board, depletion of yin and essence; or old age and physical decline, deficiency of yin and fluid. Yin deficiency, resulting in the loss of nourishment and moistening of the body, the appearance of emaciation, dry mouth, dry throat, dry stools, short yellow urine, tongue, moss, thin pulse; yin does not control the yang, the internal generation of heat, there are two zygomatic flushing, hot flashes and night sweats, five heart fever, tongue red, pulse number and so on. If you have symptoms, you should take medication under the guidance of a professional physician, do not take medication blindly on your own to avoid delays or adverse reactions.