Prolonged menstrual period after cesarean section is recommended to consult the hospital, improve vaginal ultrasound to exclude scarred uterus and endometriosis, and improve gynecological examination and cervical screening to exclude cervical lesions. The normal menstrual period of women is 3 to 7 days, if the menstrual period is more than 7 days, it is called prolonged menstrual period, which can be seen in endometriosis, cervical polyps, cervical cancer and other diseases, and women with a history of cesarean section can also be seen in keloidal diverticulum, which can be differentially diagnosed through vaginal ultrasound, gynecological examination, cervical cancer screening, and if necessary, improve the examination of hysteroscopy, colposcopy. Once women experience changes in menstruation, such as prolonged menstruation, increased or decreased menstrual flow, they should consult the obstetrics and gynecology clinic in a timely manner to identify the cause and then treat the symptoms.