For men who often smoke, drink and stay up late at night, it is easy for them to suffer from yin deficiency and fire, such as mouth ulcers, sore throat, red eyes, irritability, insomnia and dreaminess. 2. For men with constipation and difficulty in defecation caused by intestinal dryness, and cough and phlegm caused by lung dryness, if they take Colla Corii Asini properly, it can have good benefits of relieving cough and phlegm and laxative by moistening dryness.