Yosmin belongs to the short-acting contraceptives, when taking this kind of drugs for the treatment of disease, there is a small amount of vaginal bleeding in the middle of the treatment, the time is not very long, can be in 3-5 days or so stop by themselves, belongs to the normal physiological phenomenon. It is a normal physiological phenomenon. It is due to the effect of hormones in the body on the uterine lining, the appearance of withdrawal bleeding, you can not need to carry out treatment. Yosmin need to pay attention to the regularity, according to the course of treatment to take, if the process of taking the missed dose is more often, easy to cause the body’s hormone secretion changes, will cause menstrual disorders, endocrine disorders and other diseases, and may even appear to have the risk of hemorrhage. It is recommended that patients take the medication regularly according to their personal condition, which can reduce the occurrence of adverse reactions.