A normal woman’s period is between 3-7 days, so if there is still a small amount of vaginal bleeding on the 7th day it is a normal sign and can be continued to be observed. If the period continues to be unclear or even prolonged to 10 days, it is important to exclude the possibility of pregnancy. Pregnancy may cause bleeding like menstruation, but it is not regular and will not stop on its own, and it may last longer, such as pre-eclampsia or ectopic pregnancy, and this kind of bleeding can easily be mistaken for menstruation and cause delays, so you should consult a doctor as soon as possible. In addition, common causes of prolonged periods such as luteal atrophy and luteinizing hormone deficiency leading to atrophy are very common and can be treated by giving luteinizing hormone supplements. Cervical and uterine lesions such as cervicitis, cervical polyps, cervical cancer, endometrial polyps, uterine fibroids, endometrial cancer, etc. can cause incomplete menstruation and require timely gynecological examination to identify the cause for targeted treatment.