Menstruation usually occurs once a month, 28-30 days, if the menstrual cycle starts again in ten days, it is called abnormal uterine bleeding, and the cause should be further investigated. Gynecological ultrasound can be performed to understand the condition of the endometrium and adnexa, to see whether there are polyps in the endometrium or whether there are abnormal echoes in the uterine cavity; you can also consider performing a blood HCG test, if the blood HCG is negative (-), and there is no obvious abnormality in the uterine adnexa ultrasound, then you can consider giving symptomatic treatment to stop the bleeding, anti-inflammatory and other treatments. If the bleeding stops, you can ignore it for the time being and observe the next month’s menstrual period. It is not enough to worry about the occasional menstrual irregularity. If this situation occurs again next month, consider the hormone six tests, or even blood clotting four tests, but also do some gynecological examination, to consider whether there are some organic lesions, such as cervical polyps and so on.