Fire is the heat evidence in traditional Chinese medicine. Colla Corii Asini itself is sweet and flat in nature, so as long as the medication is used in accordance with the doctor’s instructions, even if it is not paired with other medications, it basically does not show signs of heat. Colla Corii Asini is a traditional Chinese medicine, the main choice is the dried or fresh skin of the equine donkey, which is decocted and concentrated into a solid gum. It is sweet in flavor, flat in nature, and belongs to the lung, liver and kidney meridians, with the effect of tonifying blood and nourishing yin, moistening the lungs and stopping bleeding. It can be used in the treatment of all signs of blood deficiency, hemorrhage, dry cough of lung yin deficiency, injury to yin in fever, heartburn and insomnia, yin deficiency and wind movement. The adverse reactions of this product are not clear. Note that this product is prohibited for those who are allergic to this product, and allergic persons should be cautious. Because this product is sticky and greasy, it hinders digestion, so people with weak spleen and stomach should be cautious of using it. However, Colla Corii Asini is sweet and flat in nature, and generally does not show signs of heat as long as the medicine is taken in accordance with the doctor’s instructions. If you need to use this product, you should be under the guidance of a physician, do not use the drug without authorization, so as not to cause adverse reactions.