In medical terms, it is called menstruation. Brown discharge from the vagina a few days after menstruation is usually a bloody discharge formed by oxidation. It is commonly caused by physiological reasons such as ovulatory bleeding and sexual intercourse, but also by pathological reasons such as endocrine diseases, inflammation and occupational lesions. Generally, you need to go to the hospital for relevant examination to clarify the cause before symptomatic and causal treatment. I. Physiological causes: 1. Ovulatory bleeding: between two periods, due to slight fluctuations of estrogen during ovulation, resulting in a small amount of endometrial flaking and a small amount of vaginal brown discharge, which is usually a normal physiological phenomenon. If it occurs only once in a while, it usually does not need special treatment. If it occurs for three months in a row and other diseases cannot be ruled out, it needs to be examined in hospital to determine the cause. 2. Excessive sexual life: When women have intercourse, the vaginal mucosa breaks and bleeds due to excessive friction. If the breakage is serious and the bleeding is large, you can go to the hospital for hemostatic treatment, such as using vitamin K1 and aminolevulinic acid to stop the bleeding as prescribed by the doctor. Second, pathological causes: 1, endocrine diseases: when there is dysfunctional uterine bleeding, neuroendocrine disorders, abnormal drop of estrogen in the intermenstrual period, stimulating irregular shedding of endometrium, vaginal bleeding, blood volume can be turned into brown secretion due to oxidation. Drug treatment is feasible after examination and diagnosis in the hospital, such as taking estradiol valerate tablets to bring back the estrogen level, repair the endometrium and stop the bleeding, or endometrial electrosurgery, which is a direct surgical electrocoagulation to stop the bleeding. 2. Inflammation: When inflammation occurs in the vagina, the mucous membrane is congested and the secretion increases. Patients need to be treated under the guidance of a doctor, usually with anti-inflammatory drugs such as levofloxacin and metronidazole. When cervicitis occurs, the cervix will show symptoms of erosion and congestion, and the mucous membrane is also fragile and prone to bleeding due to breakage, resulting in brown discharge. Acute cervicitis is usually treated symptomatically with antibiotics, such as cefixime and ceftizoxime, under the guidance of a doctor; 3. Occupational lesions: When there are occupational lesions in the cervix or uterine cavity or endometrium, such as benign cervical polyps and uterine fibroids, the surface layer of the lesion is covered with capillaries and is fragile, which may break and bleed due to friction, and the polyps can usually be surgically removed under hysteroscopy . As for malignant occupying lesions, such as cervical cancer and endometrial cancer, the tumor erodes blood vessels and may cause bleeding, which is usually treated with hemostasis, such as aminoglycolic acid injection intravenously to stop bleeding, and then radical surgery to remove the tumor. If the cancer spreads severely, total hysterectomy may be required to remove the uterus completely to avoid further spread of cancer. In addition to the above-mentioned causes, patients may experience vaginal bleeding as brown discharge due to endometrial lining breakage caused by friction of intrauterine device, or fluctuation of endocrine secretion of the organism caused by excessive stress, staying up late or exercising too much, which affects the normal metaphase of endometrium and leads to vaginal bleeding and brown discharge. No matter what the cause of brown discharge is, patients should go to the hospital for relevant examination at the first time and carry out treatment under the guidance of the doctor, not to treat blindly on their own.