In order to achieve better contraceptive effect, more and more women choose to use IUD to prevent pregnancy. IUD is indeed a simple and convenient way of contraception, but some women may experience physical discomfort after IUD, such as back pain when they have their period, slightly increased menstrual volume or slightly longer period than before, which may be 3 or 4 days normally, but 4 or 5 days after IUD. In addition, some women may have a brownish discharge from the white belt after IUD, which is more obvious around the time of menstruation. This is mainly due to the fact that the IUD affects the contraction of the uterus. Before and after menstruation, the stimulation of the ring leads to a little brown discharge from the vagina and uterus, resulting in brown discharge in the leukorrhea. In addition to the fact that the IUD can cause this, it is also important to rule out any problems with the cervix.