Colla Corii Asini is a kind of medicine that can be taken orally all year round, especially in winter, but the time of taking Colla Corii Asini should be analyzed according to different physique. If the patient has a deficiency of yang or qi, it is best to combine it with qi and yang tonic drugs, and the best time to take Colla Corii Asini is in the morning or at noon, which helps better digestion. For patients with yin deficiency and fire exuberance, it is best to take it in the evening to enhance the effect of nourishing yin and tranquilizing the mind. Generally speaking, Colla Corii Asini is more suitable to be taken on an empty stomach, which helps absorption in the stomach and intestines. However, for patients with poor digestion and gastrointestinal diseases, it is best to take Colla Corii Asini one hour after meals. For patients who are not sure of their own situation, they should not take the medicine blindly, and it is best to go to the Chinese medicine department to ask about their own situation, to clarify whether it is a yin deficiency or a yang deficiency, and then choose the time to take the medicine according to the different situations.