There are still more reasons for vaginal bleeding to occur a week after a clean period. The following are common causes in clinical practice: 1. Vaginal bleeding caused by endocrine disorders that result in the shedding of the endometrium, such as estrogen and progesterone deficiency, which can cause the endometrium to shed. 2. Inflammation of the endometrium, which is often accompanied by pain in the lower abdomen and vaginal bleeding that is 3. poor contraction of the uterus due to endometrial polyps and submucosal fibroids, which can also lead to vaginal bleeding. 4. endometriosis, which can also cause irregular vaginal bleeding in clinical practice. 5. tumors of the pelvis, which can also lead to vaginal bleeding. Therefore, if vaginal bleeding occurs a week after menstruation, you must go to the hospital for examination to find out if there are any abnormalities in the vagina, cervix and uterus, and only use medication according to the results.