Colla Corii Asini can play a role in tonifying blood and nourishing yin, there is no such thing as the best days to eat after menstruation, and should be used in accordance with medical advice. Colla Corii Asini is a kind of sweet and flat tonic Chinese herbal medicine, with the effect of tonifying blood and nourishing yin, stopping bleeding and moistening dryness. Clinically, it can be used to treat blood deficiency and yellowish color, insomnia, palpitations (rapid heartbeat, often accompanied by panic), dizziness, dry lungs and coughs, leakage (excessive menstruation or dripping), blood in stools and other conditions. Colla Corii Asini is nourishing and greasy, easily hindering the digestion of the spleen and stomach. People with weak spleen and stomach and loose stools (thin and unformed feces) should be cautious in using this product. If there is a deficiency of qi and blood, and qi and blood are depleted during menstruation, Colla Corii Asini can be taken under the guidance of a doctor to replenish blood and nourish yin. It should be used under the guidance of a doctor to identify the symptoms and avoid self-medication.