Hi, Thanks for writing to us. Vaginal bleeding due to c section can be due infection of the uterus,retained placenta and many more reasons. If there are symptoms such as fever with rigors or foul smelling vaginal discharge it is more in favor of infection. it is suggested you have a ultrasound evaluation to exclude any bits of placenta inside your uterus. Any family history of bleeding disorders needs to be considered. very rare chances of vesicular mole also should be kept in mind for that you a blood test name beta hcg . hope this information will guide you. keep us informed about the outcome after consultation with obg doctor