Breast swelling and pain and reddish-brown vaginal discharge during non-physiological period are considered to be abnormal vaginal bleeding, which may be caused by ovulation bleeding, functional uterine bleeding or organic lesions. 1. Ovulation bleeding: for women who have regular menstruation, about 14 days before the next menstruation is in the period of ovulation, at this time, if there is breast swelling and bleeding, it is considered to be the hormone level change during ovulation, which is a normal physiological phenomenon, it is recommended that you can observe more attention to rest. 2. Functional uterine bleeding: If the menstruation is not regular, and there is prolonged menstruation and excessive menstruation, then there is also a possibility of abnormal vaginal bleeding. 3. Organic lesions, such as cervicitis, cervical polyps, fibroids, etc., can also lead to abnormal vaginal bleeding. If you have breast pain and vaginal bleeding during non-menstrual period, if the amount is small, you can observe it temporarily, if the bleeding is large, it is recommended to consult a doctor in time for symptomatic treatment.