Colla Corii Asini refers to the gelatinous substance made from donkey skin. From the perspective of Chinese medicine, Colla Corii Asini itself has a good nourishing effect on yin, in addition to nourishing yin, it also has the effect of nourishing blood and stopping bleeding, and also has a certain effect of promoting water and reducing swelling. First of all, it can treat Yin and Blood deficiency, which is often manifested by tiredness and fatigue, dry mouth, red tongue, less tongue coating, some patients can also manifest the five hearts, simply put, the heart of the hands and feet burning, accompanied by heart trouble, insomnia. For patients with blood deficiency, often these patients show a paler complexion and weaker form, and if they go for a blood test, they will find a low hematocrit. Besides, it can also be used to treat bleeding caused by various reasons. Modern research has also confirmed that Colla Corii Asini can adjust the coagulation factors of the body and help the body to stop bleeding quickly, and it can also be used to treat women’s menstrual disorders, such as amenorrhea, low menstrual flow, or menorrhagia, or heavy menstrual flow. It can help to increase the menstrual flow, while it can help to reduce the menstrual flow if the menstrual flow is high. In addition, Colla Corii Asini has a good effect on water retention and swelling, which can be used to treat edema of the limbs caused by nephritis or kidney disease.