Brown leukorrhea without odor is usually caused by a small amount of vaginal bleeding, the cause may be physiological reasons or pathological reasons. 1. Physiological reasons: some women will have ovulation bleeding before ovulation, which leads to brown secretions, this is a functional bleeding need not worry, after ovulation will be restored. 2. Pathological reasons: brown leukorrhea without odor may also be caused by pathological reasons, such as vaginitis, cervical polyps, cervical cancer, endocervical cancer or placement of intrauterine device, etc., need to go to the hospital as soon as possible to find out the cause of the disease, symptomatic treatment. It is recommended that patients with brownish leukorrhea should go to the appropriate department for examination, and under the guidance of the doctor, identify the cause of the disease and then treat the symptoms, so as not to delay the condition.