A week of menstruation followed by a period may be caused by a small amount of bleeding during ovulation, menstrual disorders, or abnormal vaginal bleeding due to pathological causes. Patients need to go to a gynecologist for hormone tests, x-rays and other related examinations to clarify the cause. During ovulation, the estrogen level in the body changes, and some patients with sensitive constitution may experience transient vaginal bleeding. Usually, the amount of bleeding during ovulation is not very much and the bleeding time will not exceed three days, so patients need not worry too much. If the patient has her period for a week and then comes back for reasons other than ovulatory bleeding and there are environmental changes, emotional abnormalities, improper medication, etc., consider the possibility of menstrual disorders. If diagnosed, it is often treated with estrogen and progestin medications. In addition, patients should also consider abnormal vaginal bleeding caused by diseases such as cervical polyps and submucosal fibroids. Patients with cervical polyps may have a small amount of bleeding after sex with smelly vaginal discharge. Patients with submucosal fibroids may experience increased menstrual flow, prolonged periods with lower abdominal cramps and back pain. The normal menstrual cycle of women is 21-35 days, and the duration is usually 2-8 days, and there will not be any bleeding again after the end of menstruation. If this happens, it is recommended to seek medical treatment in time to avoid delaying the condition.