There are three main reasons for dark brown leucorrhea: 1, menstrual blood retention and delayed discharge. Can be seen in irregular menstruation, hormone level disorder, endometrial diseases and so on. 2, should be alert to the possibility of malignant tumors, such as cervical cancer, uterine cancer, vaginal tumor, etc. ; 3, some benign lesions can also appear leucorrhea dark brown, such as cervical erosion.

From your description, you have had symptoms for a week. Don't underestimate it. I suggest you go to the hospital for examination immediately to avoid delaying your illness. I wish you the best of health! ! !