The five organs will be on fire bitterness and irritability in the liver, insomnia and yellow urine in the heart “on fire” this Chinese medical term in our country can be known to all, but not everyone can explain the mechanism inherent in it. From the point of view of deficiency and reality, fire can be divided into deficiency fire and real fire. Deficiency fire is caused by Yin deficiency that cannot control Yang energy. In the case of Yin-Blood deficiency, the body will be Yang-rich, and the disease is often slow and long-lasting, with symptoms such as irritable heat in the five hearts, red cheekbones, insomnia and night sweating, dry mouth and throat, dizziness, tinnitus, red tongue with little coating, and fine pulse. In the case of real fire, there is a deficiency of yin and blood and there is fire, often with symptoms such as sore throat, toothache, sores on the tongue, thirst for cold drinks, yellow and heavy-smelling urine, abdominal distension and constipation. The treatment of deficiency fire and real fire is different. Deficiency fire should be nourished with drugs such as Dihuang, Xuan Shen and Mai Dong, while real fire should be cleared and lowered with drugs such as gypsum, Scutellaria and Huang Lian. The fire, many people wonder why some people have blisters on their mouths, while others take the “lower three roads”? This is because they “fire” different organs. Fire can be divided according to the five organs, the five organs of fire each have their own characteristics, the performance of different parts. Heart fire manifests as heart irritation, dry mouth, night sweats, poor sleep, mouth ulcers, etc. In addition, there are also changes in urine, such as yellow and red urine, frequent urination, urgent urination, painful urination, etc. This is because the heart and small intestine are on the same level, and heart fire is transmitted to the small intestine through the meridians, which will cause these symptoms. The representative drugs for clearing heart fire are Huang Lian, Gardenia, and Bamboo leaves, etc. Lung fire is manifested by coughing, shortness of breath, phlegm production and yellowish phlegm. Lung fire can also travel through the meridians to the large intestine below, causing constipation, dysentery, etc. Medicines for clearing lung fire include Scutellaria baicalensis, Zhi Mu, and Lu Gen. The liver is the general’s official. When the liver fire is high, the upward impulse is most obvious, resulting in dizziness, redness of the eyes, redness of the face, bitterness of the mouth, irritability, and even frenzy and fainting. To clear liver fire, you can choose medicines such as gentian herb, aloe vera and summer cress. Liver fire is often accompanied by liver qi stagnation, so liver fire should not only be cleared, but also needs to be unblocked with drugs such as angelica, white peony and tribulus terrestris, otherwise the fire will not be cleared. Chinese medicine rarely speaks of spleen fire, more stomach fire instead. Stomach fire is manifested as swollen and painful gums, bleeding gums, bad breath, easy hunger, constipation, etc. Stomach fire can be cleared by using raw gypsum, Huang Lian, rhubarb, etc. Kidney fire is usually caused by Yin deficiency, which is a deficiency fire and needs to be treated by nourishing Yin. Finally, we should note that there is a special and common “fire”, which can be understood as a kind of “war fire”, that is, the redness, swelling, heat and pain after a cold, such as tonsillitis, although it also belongs to the fire, but definitely not simply to clear heat and extinguish fire. The essence of the fire is that it is attacked by external evil, and it is only because of the battle between the good and the evil that the manifestation of the fire arises, so the correct treatment should be based on dispersing and relieving the symptoms, with a small amount of heat-clearing medicine to drive away the evil. If only heat is cleared without dispersing the evil, the evil will join the inside even more, apparently cured, but the fever and sore throat will recur in the future.