There is no menstruation, but there is a brown bloody secretion. There are many possible reasons. It is suggested to go to the hospital for gynecological internal diagnosis and color ultrasound examination first. You can do cervical cancer screening, that is, cervical TCT and HPV examination, to exclude cervical lesions. In addition, we should do a color ultrasound examination to see if there is any polyp in the uterine cavity, endometrial hyperplasia, except for this organic disease. In addition, we also need to check. If this brown secretion occurs in the middle of two menstruations, it may also be bleeding during ovulation, which is a normal physiological phenomenon and does not need special treatment. If this condition persists, oral contraceptives can be given for treatment.