Four and a half months after the hysterectomy, there are many reasons for a little bleeding after sex, which are considered to be related to vaginal stump polyps, vaginal stump splitting, vaginitis and other factors. 1. Vaginal stump polyps: after hysterectomy, the vaginal stump may not fit well after sewing, causing the polyps at the sewing place to proliferate, which may cause vaginal bleeding if the polyps are touched during sexual intercourse. 2. Vaginal stump splitting: If sex is too violent or the incision heals poorly, it will easily lead to splitting of the vaginal stump, which will result in localized pain, vaginal bleeding and other clinical manifestations. 3. Vaginitis: If a woman has vaginitis, due to the stimulation of inflammatory factors, the local tissue congestion and edema is obvious, vascular permeability increases, sex will rub the vaginal wall, resulting in vaginal bleeding. For the hysterectomy four and a half months after the occurrence of sexual intercourse with bleeding women, it is recommended to go to the regular hospital in a timely manner, improve the relevant examination, clear cause of the disease under the guidance of the doctor active treatment.