A small amount of bleeding 20 days after hysterectomy may be caused by bleeding from the vaginal stump, or it may be caused by polyps on the vaginal stump or secondary infection. 1. Bleeding from the vaginal stump: a small amount of bleeding 20 days after hysterectomy may be caused by poor healing of the vaginal stump, and if the patient does not have any other uncomfortable symptoms, the bleeding may stop on its own after a period of time. 2. Vaginal stump polyps: 20 days after hysterectomy, there is a small amount of bleeding, may also be after hysterectomy, vaginal stump polyps, if the polyp friction or stimulation, polyp rupture may lead to a small amount of vaginal bleeding. 3. Secondary infection: 20 days after hysterectomy, there is a small amount of bleeding, may also be the wound stump secondary bacterial infection, in addition to a small amount of vaginal bleeding, the patient may have chills, fever and other symptoms of systemic infection. If the symptoms of small amount of vaginal bleeding are not relieved after 20 days of hysterectomy, or accompanied by other symptoms, you should go to the hospital in time, complete the relevant examinations, and give targeted treatment under the guidance of professional doctors to clarify the cause.