A period that clears in 2 days is abnormal. Normally, menstruation usually lasts from 3 days to 7 days. If your period clears in 2 days, it is an indication of a missed period, which may be due to the following reasons For example, polycystic ovary syndrome, hyperprolactinemia, or damage to the endometrium due to repeated abortions. Then, incomplete adhesions in the uterine cavity may lead to menorrhagia, so it is recommended to go to the hospital for examination. First, on the second day of menstruation, blood can be drawn for sex hormone test and thyroid function can be checked to rule out abnormal thyroid function causing menorrhagia. In addition, it is recommended to have an ultrasound examination after menstruation to rule out the possibility of incomplete adhesions in the uterus.