A small amount of vaginal bleeding for 20 days after a hysterectomy is usually abnormal and patients are advised to seek prompt medical attention to find out the cause. After hysterectomy, patients usually have a bleeding period of 3 to 7 days, which is normal and no need to worry too much. However, due to individual differences, some patients may also bleed for a relatively longer period of time, although it usually returns to normal within 14 days. Therefore, the bleeding time is usually within 14 days is normal, if the patient has bleeding time of 20 days, need to be vigilant whether there is poor healing of the vaginal stump, stump infection, etc., may be the vaginal stump formed granulation tissue, small polyps, and is caused by touching. There may be other reasons for the small amount of vaginal bleeding for 20 days after hysterectomy, so it is recommended to consult a doctor in time, complete the relevant examinations, clarify the cause of the disease under the guidance of a professional doctor, and carry out the relevant treatments in accordance with the doctor’s instructions.