A brownish and scanty menstrual period is usually caused by ovarian failure, uterine dysplasia, and endometrial damage. It is recommended to consult a doctor in time to find out the cause and treat it under the doctor’s guidance. 1. Ovarian dysfunction: due to excessive dieting, stress, irregular diet and work and rest, the ovaries do not have enough follicles in reserve, hormone secretion is abnormal, and the patient is not able to ovulate normally, resulting in ovarian dysfunction, which is manifested as brownish color and low amount of menstruation. 2. Uterine dysplasia: menstruation is the exfoliative bleeding that occurs with the changes of the ovaries. If the patient’s uterus is very small or malformed, and there is only a small amount of exfoliation of the uterine lining in each cycle, it will result in a small amount of menstruation and brown bleeding. 3. Endometrial damage: the patient’s genitals are infected or surgical damage to the endometrium, resulting in the endometrium can not be normal proliferation, shedding, causing menstrual bleeding brown and small amount. There may also be other reasons, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, and then give targeted treatment or treatment.