The coffee-colored discharge during menstruation constantly, also indicates that there is a small amount of bleeding, which is not normal, mainly consider the following reasons: 1, after pregnancy some women can have a small amount of bleeding early, the actual is not normal to menstruation, can be diagnosed by checking the urine HCG, blood HCG whether pregnant; 2, work stress, anger, tired, stay up late, emotional instability, etc., can also appear long menstruation time, small amount; 3, endocrine disorders can also cause menstrual irregularities, or ovarian decline in the near menopause, or puberty just after menstruation girls, ovarian function is sound. 3, endocrine disorders can also cause menstrual disorders, near menopausal women ovarian decline, or adolescent girls just menstruating, ovarian dysfunction, can cause non-ovulation or low menstrual volume, long; 4, suffering from endometrial polyps or submucosal fibroids, such patients usually start bleeding in large amounts, followed by a continuous situation, can be found through ultrasound; 5, long-term overdose of emergency contraceptives It causes menstrual disorders, even vaginal bleeding and long menstrual periods. If a woman has continuous bleeding for more than 7 days of menstruation, she must pay attention to it. Patients are suggested to go to the hospital for some examinations, and the doctor will help analyze and deal with it according to the cause.