Colla Corii Asini is effective in tonifying blood and nourishing yin, moistening dryness and stopping bleeding. If elderly men with yang deficiency meet the indications for Colla Corii Asini, they can take Colla Corii Asini under the guidance of a doctor. Colla Corii Asini is used for blood deficiency and atrophy, dizziness and palpitations (rapid heartbeat, often accompanied by panic), muscle atrophy and weakness, heartburn and insomnia, internal movement of deficiency wind, coughing with dryness of the lungs, coughing and haemoptysis due to exertion, vomiting and urination of blood, blood in the stools and leakage of urine and faeces (excessive menstrual flow or more than a few drops), and foetal leakage of pregnancy (small amount of bleeding from vagina in the early stage of pregnancy). It should be noted that this product is sticky and greasy, hindering digestion, so it should be used with caution for those with weak spleen and stomach. If there is any discomfort, it is recommended to consult a doctor promptly. If medication is needed, it should be diagnosed by a doctor and the treatment should be standardized according to the doctor’s prescription.