After 40 days of hysterectomy, there is light blood in the stool, which may be due to poor wound healing, infection of the wound, etc., and need to be cleaned up and treated with antibiotic drugs and other methods. 1. Poor wound healing: If the vaginal stump is not completely healed after hysterectomy due to irritation and other factors, you need to go to the hospital for debridement treatment, observe the specific condition of the wound, and disinfect it appropriately to promote healing. 2. Wound infection: If the wound after hysterectomy is infected due to vaginitis or other reasons, it will also lead to bleeding that cannot be stopped, at this time you can use metronidazole suppositories for external use or use potassium permanganate solution for external washing treatment. If there are symptoms of pale blood and water even after 40 days of exertion after hysterectomy, it is recommended to go to the hospital in time and take reasonable methods of treatment under the guidance of the doctor to promote the alleviation of the condition. The above medicines should be used under the guidance of a doctor, and self-medication is prohibited.