The reasons for bleeding again after half a month of menstruation should be judged according to the patient’s situation, as follows: 1. If the amount is relatively small and the time is relatively short, consider that it may be ovulatory bleeding, because in terms of time, in line with the time pattern of ovulation, ovulatory bleeding is a normal physiological phenomenon, generally do not need to worry and treatment; 2. If the amount of bleeding is more and the bleeding time is longer, ovulatory bleeding can basically be ruled out. You need to see a doctor for an ultrasound examination to understand the condition of the uterine lining, and you can also do a hormone six test to see the function of the ovaries, and then, according to the specific situation, give the appropriate medication to regulate, and if it is functional uterine bleeding, you can also use hemostatic drugs.