Menstruation lasts for ten days with brown discharge all the time, which may be related to factors such as preeclampsia, endocrine disorders, and gynecological diseases. 1. Pre-eclampsia: Women who are sexually active may have pre-eclampsia in the early stages of pregnancy due to unstable implantation of the fertilized egg, which will result in the symptom of dribbling of brown discharge, which can be diagnosed by checking the blood HCG, progesterone, and gynecological ultrasound. 2. Endocrine disorders: If the patient has irritability, insomnia, headache, weight change and other symptoms in addition to irregular menstruation, it may be caused by endocrine disorders, and it is necessary to check the level of sex hormones for a clear diagnosis. 3. Gynecological diseases: If you suffer from endometritis, cervical polyps, vaginitis and other gynecological diseases, the mucous membrane of the vagina and cervix is in a state of congestion and edema, and bleeding symptoms may occur under the stimulation of inflammation, which, when combined with the vaginal secretion, will be manifested as a brownish discharge. The cause can be clarified by examinations such as leukorrhea routine, ultrasound and gynecological examination. Therefore, there are more reasons for brown discharge for ten days of menstruation, and it is necessary to combine the patient’s symptoms and do the corresponding examination to clarify the cause.