Possible causes of this symptom include: 1. Because of various gynecological inflammatory diseases or gynecological oncological diseases, the leukorrhea in the vagina increases, and the leukorrhea flowing out of the vagina will cause a feeling like menstrual flow after menstruation. In this case, you can go to the hospital for routine examination of leukorrhea and gynecological ultrasonography, etc., to clarify the specific causes of excessive leukorrhea and then carry out treatment. 2, there is no excessive leukorrhea phenomenon, but there will be a similar to the lower abdomen after the onset of menstruation, pain, lumbar distension, breast distension and pain, etc., on the one hand, consider that in the last few days may be subject to the stimulation of cold affecting the menstrual blood flow in a timely manner, or due to the recent stress of life, frequent and frequent use of the Internet. On the one hand, it may be due to cold stimulation in recent days, which may affect the onset of menstrual flow, or due to excessive stress in life, frequent late nights, irregular life, etc., which may cause the normal endocrine function of the ovaries to be disrupted, affecting the normal onset of menstrual flow, and giving rise to the manifestation of PMS. This situation can be observed for a few more days, if the delay of one week menstruation does not come, need to go to the hospital.