A: The tampon can never get lost inside you, because it can’t go anywhere. The passage between your vagina and your cervix is far too small to allow a tampon through. The tampon catches the menstrual fluid optimally if the tampon is placed past the pelvic floor muscles and against the cervix. If the tampon is placed behind the cervix, the tampon does not work. If it locates too deep behind the cervix and you can not remove yourslef do no wait longer than 8 hours consult with your health professional or help of your partner.