There are three main reasons to consider when you have two periods in a month. The first one is ovulation bleeding, which is mainly manifested as a small amount of bleeding after a normal menstrual period. This small amount of bleeding usually occurs in the middle of menstruation, lasts for 3-4 days and clears on its own, with no other special signs. Occasional bleeding does not require special treatment, but if it occurs frequently, it can be treated with short-acting contraceptive pills. Secondly, the main consideration is contact bleeding, if the patient’s menstrual period is clean, the vaginal bleeding after coitus is mainly considered to be contact bleeding. In this case, it is necessary to do cervical screening to rule out cervical lesions, and after ruling out cervical lesions, it is mainly considered to be caused by inflammatory diseases or endometrial polyps, cervical polyps and other diseases. Thirdly, the main consideration is menstrual disorders, menstrual disorders are mainly manifested in two vaginal bleeding time and the amount of bleeding is basically the same, this situation needs to check the sex hormone six, gynecological ultrasound, hysteroscopy, etc. to determine whether it is caused by endocrine disorders or organic pathology caused by bleeding.