Colla Corii Asini is used as a traditional Chinese medicine for conditions such as dry lungs and coughs, pregnancy leakage (a small amount of vaginal bleeding that occurs early in pregnancy), and muscle impotence and weakness. Colla Corii Asini is a substance of the same origin as food and medicine. It is a solid gum made from the dried or fresh skin of the donkey, a member of the equine family, which has been decocted and concentrated. As a traditional Chinese medicine, it belongs to the lung, liver and kidney meridians, with sweet flavor and flat nature, it has the effect of moistening dryness and nourishing yin, stopping bleeding and tonifying blood. It can be used for coughing with dry lung, coughing and hemoptysis with labor, insomnia with heartburn, heat disease and injury of yin, convulsion of hands and feet, and internal movement of wind with deficiency of yin and wind, etc.; bleeding diseases such as fetal leakage in pregnancy, vomiting blood, urinating blood, bleeding in stool and disintegrating blood (excessive menstruation or dripping), etc., which is the key medicine for stopping bleeding; impotence and weakness of muscles, dizziness and palpitation (rapid heartbeat, often accompanied by panic), blood deficiency and atrophy, etc., which are caused by bleeding and blood deficiency. The adverse effects of the drug are not clear, and people with weak spleen and stomach should use it with caution. If you are not feeling well and need to use the drug, please go to the hospital and use the drug under the guidance of a professional doctor, do not use the drug on your own to avoid adverse reactions.