Vaginal bleeding at nine months after cesarean section when kicked by the baby is considered to be a possible risk of incision laceration and preterm miscarriage, and it is recommended to seek immediate medical attention for ultrasound examination. Nine months after cesarean section, the uterus has normally returned to normal and the incision is healing well. In the case of vaginal bleeding from a baby’s kick, you should go to the hospital for an examination to find the source of the bleeding, assess the healing of the incision, and provide targeted treatment. If ovulation has resumed and you are sexually active, it cannot be ruled out that you are pregnant again nine months after the cesarean section. Vaginal bleeding after being kicked by the baby may be a symptom of preterm miscarriage, and at this time you should seek medical attention to check the ultrasound and blood HCG, and terminate the pregnancy promptly if necessary.