Vaginal bleeding found when wiping after urination has the following common causes: 1. Miscarriage and preterm delivery after pregnancy. Women who have miscarried or had a premature delivery will show little vaginal bleeding and will also have paroxysmal uterine contraction pain in the lower abdomen. 2. Pathological organic lesions, such as cervical polyps, cervicitis, endometrial polyps, submucosal fibroids, adenomyosis, endometrial cancer, and Irregular vaginal bleeding may occur when wiping after urination. 3. Hormonal disorders may cause this condition, such as estrogen-secreting granulosa cell tumors. 4. Anovulatory abnormal uterine bleeding may also cause this condition, which can only be clarified after the relevant examination.