Light blood flow after menstruation may be caused by the following conditions: 1. It may be caused by menstrual return, a small amount of vaginal bleeding within two or three days after menstruation is clean is menstrual return, which usually stops soon and does not require treatment; 2. It may be caused by endocrine disorders, vaginal bleeding caused by abnormal ovarian function, this bleeding may manifest as irregular vaginal bleeding, which may last for a longer period of time, more or less This kind of bleeding may be caused by gynecological tumors such as uterine fibroids and ovarian cysts. This kind of bleeding may also be manifested as irregular bleeding, which can only be stopped by hemostatic treatment; 4. Bleeding caused by endometritis, endometrial polyps, adnexitis, etc. This kind of bleeding has a relatively small amount of bleeding and may be accompanied by symptoms such as abdominal pain and increased leucorrhea. If light blood appears continuously after menstruation, you need to consult a doctor for examination.