A small amount of bleeding but not during menstruation is considered to have multiple causes and should be treated promptly by gynecological examination to confirm the diagnosis and stop the bleeding if necessary. Common causes may be related to endocrine disorders, pregnancy, inflammation or systemic diseases, etc. Targeted treatment is needed after clarifying the cause. I. Bleeding caused by endocrine disorders: 1. Ovulation bleeding: The hormone level will change greatly during ovulation, in which the estrogen level drops rapidly, which may lead to endometrial shedding and bleeding, along with the feeling of lower abdominal cramping or waist pain. If the symptoms persist or worsen, oral hormone treatment can be given, or the patient can be treated by Chinese medicine identification. 2. Dysfunctional uterine bleeding: Patients often have a period of amenorrhea first, then uterine bleeding occurs, and in severe cases the bleeding can be up to 10 days or longer. Treatment requires the use of hormones and hemostatic drugs as prescribed by the doctor, and severe patients can stop bleeding by curettage. Pregnancy induced bleeding: 1. Miscarriage: If you have recently had sex without reliable contraception and have menopause, a small amount of vaginal bleeding may be associated with preterm abortion. In pre-eclampsia, vaginal bleeding is small, there is no abdominal pain or mild lower abdominal pain, and there may be early pregnancy reaction; 2. Ectopic pregnancy: one of the symptoms of ectopic pregnancy is vaginal bleeding. Patients often have a history of infertility and mostly have a small amount of vaginal bleeding after 6-8 weeks of menopause but the bleeding does not stop until the tubal lesion is removed. Inflammation causes bleeding: Chronic cervicitis can cause a small amount of vaginal bleeding, accompanied by lower back pain. It is recommended to go to gynecology department for cervical exfoliation cytology examination, and electrocoagulation, freezing and laser therapy are feasible after diagnosis. Sexual intercourse is prohibited during the treatment period and regular review. IV. Bleeding caused by systemic diseases: Vaginal bleeding caused by systemic diseases is often manifested as bleeding from multiple parts, while vaginal bleeding is more common with increased menstrual volume. V. Bleeding caused by other diseases: 1. Endometrial thickening: endometrial thickening can cause bleeding, which should be diagnosed by endometrial biopsy in hospital. Ultrasonography should be performed to confirm the diagnosis, and the treatment can be hysteroscopic myomectomy or hysterectomy. 3.Endometrial cancer: The main symptom of endometrial cancer is continuous or intermittent vaginal bleeding, and the blood volume is usually not much. In the early stage, there are no other symptoms except vaginal bleeding, and there may be no obvious positive signs during examination. In late stage, the blood volume increases and there is lower abdominal pain; 4. Cervical cancer: cervical cancer is mostly seen in middle-aged women but can also occur after menopause. Vaginal bleeding after menopause is an early symptom of cervical cancer. During examination, the cervix may show smooth or erosion, but there is contact bleeding or blood flowing from the cervical opening.