Colla Corii Asini is made from Colla Corii Asini. Taking Colla Corii Asini may aggravate the symptoms of loose stools (thin and unformed feces) due to spleen deficiency if the medicine is not taken correctly, so the medicine should be taken under the guidance of a medical professional. Colla Corii Asini is sweet in taste, flat in nature, and belongs to the lung, liver and kidney meridians. It has the effect of tonifying blood and nourishing yin, moistening dryness and stopping bleeding, and it can be used for treating the weakness of long-time illnesses, blood deficiency and dimming of the eyes, weakness of the limbs, soreness and weakness of the waist and knees, yellowish muscle thinness, forgetfulness and insomnia, women’s post-partum weaknesses, dry cough and lack of phlegm, dryness of nose and pharynx, blood in phlegm, deficiency and restlessness, and many kinds of hemorrhages, and other diseases. Caution should be exercised if the spleen is deficient and loose stools are present. When discomfort occurs, it is necessary to consult a doctor in time and choose medication under the guidance of physician’s diagnosis, and not to use medication on one’s own in order to avoid delaying the condition.