Drinking Colla Corii Asini may not necessarily bring on menstruation. Whether or not you can have your period is mainly related to the levels of estrogen and progesterone in your body, as well as the condition of your uterine lining, and drinking Colla Corii Asini can’t significantly change these conditions. Colla Corii Asini has the effect of tonifying blood, nourishing yin, moistening the lungs and stopping bleeding. It is mainly used for treating all the symptoms of blood deficiency, hemorrhage, lung yin deficiency and dry cough, heat disease and yin injury, heartburn and insomnia, and yin deficiency and wind movement. Colla Corii Asini can be used in patients with irregular menstruation caused by deficiency of qi and blood, and can also be used in conjunction with Ai Ye to treat leakage. Caution should be taken to avoid using Colla Corii Asini if the spleen and stomach are weak. Women with irregular menstruation need to do the appropriate gynecological examination to clarify the cause of the disease, and standardized treatment under the guidance of the doctor. Do not blindly use medication on your own, so as not to delay the condition or produce side effects.