Brown discharge during menstruation may be due to poor menstruation, inflammation, etc. It may also be normal menstrual blood. Patients are advised to go to a specialized hospital to determine the cause after consultation. 1. Normal menstrual blood: oxidation occurs during the discharge of menstrual blood, especially for women whose menstruation has just started or whose amount of menstrual blood is relatively small, the phenomenon of brown secretion is easy to occur, which is normal. 2. Poor menstruation: When patients suffer from cold, spicy and stimulating food or emotional depression or stress, it is easy to lead to endocrine disorders in the body, which leads to the phenomenon of poor menstruation, which may lead to the emergence of brown secretions. 3. Inflammation: Brown discharge may also be a manifestation of gynecological inflammation, such as endometritis. It is recommended that patients go to a specialized hospital for treatment. If brown discharge occurs during menstruation and is accompanied by other discomforts, it is necessary to consult a doctor in a timely manner and receive reasonable treatment under the guidance of a professional physician.