Colla Corii Asini Powder is processed from the Chinese herbal medicine Colla Corii Asini, and the correct way to take Colla Corii Asini Powder is to be melted and taken. Colla Corii Asini is a solid gum made from the dried or fresh skin of donkey, family Equidae, after decoction and concentration. Colla Corii Asini is flat and sweet in nature. Colla Corii Asini enters the liver meridian, kidney meridian, lung meridian. Colla Corii Asini has the effects of tonifying blood, stopping bleeding, nourishing yin and moistening dryness (nourishing yin essence and removing heat and evil). Colla Corii Asini can be used in the treatment of blood deficiency and atrophy, dizziness and palpitations (rapid heartbeat, often accompanied by panic), muscle impotence, vomiting blood and urinating blood, blood in stools and leakage of blood (excessive menstruation or dripping), fetal leakage of pregnancy (small amount of bleeding from the vagina in the early stage of pregnancy), heat illness and injury of yin, disturbed and insomnia, internal movement of deficiency wind, blending of the hands and feet, coughing with dryness in the lungs, coughing with strain and haemoptysis. Colla Corii Asini is sticky and greasy in nature, which hinders digestion, so it should be used with caution for people with weak spleen and stomach. The adverse effects of Colla Corii Asini are not clear. If necessary, it should be used under the guidance of a professional Chinese medicine practitioner.