Yin fluid insufficiency belongs to the category of yin deficiency in Chinese medicine, and the symptoms of this syndrome can be seen as thirst for drinking, dryness of the mouth and nose, short and yellow urine, and dry stools that are difficult to be relieved. Yin fluid deficiency refers to the deficiency of body fluid, organs, internal organs, the form of the loss of nourishment and fullness, the symptoms are seen in the mouth, nose, lips, tongue, throat, skin dryness, or the skin is shriveled and lack of elasticity, thirst for drinking, deep-set eyes, urination is short and yellow, stools are dry and difficult to get down, the tongue is red and less fluid, and so on. Yin fluid deficiency syndrome is caused by external heat and evil attack, body yang qi partial hyperactivity, organ qi deficiency and other etiological factors. Thirst, short yellow urine, dry stools, dry mouth, nose, lips, tongue and skin, red tongue with little fluid and fine pulse are the main points of identification. If you are not feeling well, you should consult a doctor in time, do not blindly use medication on your own, so as not to delay the condition.