The first thing to do in this case is to identify the cause of the period for more than a month and then treat it according to the cause. If you are a woman of childbearing age and your period is on your body for more than a month, the first thing you need to do is to rule out the possibility of pregnancy, so the first thing you need to do is to check if you are pregnant. If it is not pregnancy, you should go to the hospital for an ultrasound to see if there are any pathologies in the uterus. This is because uterine fibroids and endometrial polyps can also cause a period to stay on for more than a month. If it is an endometrial polyp, then a diagnostic curettage or a hysteroscopy is needed to get rid of the polyp. If all of these tests are fine, then this condition should be suspected to be functional uterine bleeding and an ultrasound will need to be done to see the thickness of the lining of the uterus. If the lining of the uterus is thick, diagnostic curettage can be done. If the lining of the uterus is not very thick, you can take medicines to stop bleeding and anti-inflammatory drugs.