Excess heat can be divided into thirst and thirst caused by heat entering the blood: although the two syndromes are both internal excess heat, it should be distinguished that evil heat is in qi and blood. The former is mostly due to heat evil entering the interior, and Yangming qi is divided into heat. It is characterized by thirst, accompanied by fever, sweating and heavy pulse; Yangming fu-organ syndrome will be accompanied by constipation, abdominal distension and pain. In the camp, the blood entered the heat, and the mouth was dry, but the degree was greatly reduced. And just entered the camp. Because of heat evil, the body fluids in my blood are all distilled. Although my mouth is thirsty, I am not very thirsty. I don't drink much even when I'm thirsty. It's annoying and hot to see at night. Or restless, faint rash. Symptoms of fever such as red tongue in nourishing blood. For this kind of internal heat thirst syndrome, thirst stops when the heat clears, and there is no need to produce fluid to quench thirst. For those with excessive heat and qi, it is advisable to clear away heat and purge fire and protect body fluid. The prescription is selected from Tiger plus ginseng soup. Yangming fu-organs were treated with Da and Xiao Chengqi Decoction. When heat enters the camp and blood comes out, when the camp is clear and the blood is cold, Qingying decoction is selected. Rhinoceros horn and yellow soup and so on.

Hot and humid steaming thirst: usually occurs at humid temperature or humidity. But it is not uncommon in miscellaneous diseases. Generally speaking, dampness-heat syndrome, because dampness is yin evil, is not harmful to body fluids, so it is not thirsty. However, those who pay equal attention to damp heat or heat is heavier than dampness may have symptoms such as thirst and body heat. Its clinical characteristics are: thirst does not like to drink, or drinks too much, or likes to drink hot, accompanied by symptoms of dampness, such as low body heat or afternoon body heat, fullness in the chest, fullness and so on. Heavy head, loose stool, yellow and greasy fur, etc. Treatment should be combined with clearing away heat and dampness, and treated according to the severity of damp heat. Shisan Decoction and Lianpu Drink can be used for those with heat heavier than dampness, and Huangling Talc Decoction and Ganlu Disinfection Pill can be used for those with both damp and heat. Hot and humid thirst, because of its thirst, does not want to drink or does not drink much, should be distinguished from heat entering the blood. When heat enters the blood, there must be syndromes of blood heat (such as delirium and rash), which is quite different from damp-heat syndrome.

Drinking water to quench thirst: due to phlegm and turbid internal resistance. Yang Qi can't be used, gasification is unfavorable, and body fluid can't run, which leads to thirst. It is characterized by dry mouth but no desire to drink, or discomfort after drinking. Or throw up when you get into water. At the same time, the abdominal fullness, edema, palpitation under the heart or under the umbilicus, unfavorable urination and watery tongue coating stopped by drinking water. It should be treated by warming yang and dissolving yin. For abstainers under the heart, Gui Ling Shugan Decoction is the main one; Wuling powder can be used for those who stop drinking in the lower energizer.

Thirst due to dryness of lung and deficiency of body fluid and thirst due to hyperactivity of fire due to yin deficiency: the former is that exogenous dryness and evil burn lung and body fluid, or chronic cough hurts lung yin. The lung is the airway, which governs the use of body fluid, fur and large intestine. So its symptoms are thirst, dry nose and dry throat. Dry cough without phlegm, dry skin, dry stool, etc. The latter is either consumed by yin and body fluid in the late stage of fever, or the deficiency of yin and blood due to long-term illness, resulting in internal heat due to yin deficiency. Therefore, not only dry mouth and throat, but also at night. And insomnia, dizziness, bone steaming, hot flashes, five upset, red tongue, body fluid deficiency and other symptoms of yin deficiency and excessive fire. For patients with lung dryness and fluid deficiency, it is advisable to clear lung dryness and produce fluid, and choose Qingzao decoction or Qingzao Jiufei decoction; Those with yin deficiency and fire flourishing should nourish yin and promote fluid production, and only Liuwei Dihuang Decoction and Zengye Decoction can be used.

In short, there are many symptoms of thirst, and the most common symptoms are discussed above. Pay attention to whether to drink, drink more and drink less, like warm and cool, and carefully analyze the pulse condition and tongue coating. Distinguish between qi and blood, yin deficiency and hyperactivity of yang, deficiency and excess, what is viscera and what is viscera, and treat them separately, which cannot be regarded as internal heat.