According to the sources, a tampon cannot get lost inside the body. It can go higher in the vagina, and the string can even get tucked up in there, but its not lost. Its in there. That’s because the cervix is a barrier between the vagina and the uterus, so basically, the vagina is a dead end. If a tampon is retained, it means that it has been inserted but later becomes either stuck or lost. A retained tampon can cause symptoms such as foul-smelling discharge, fever, and pain. It is important to remove a retained tampon as soon as possible to prevent infection and other complications. Tampon manufacturers are not legally required to disclose the ingredients found in their tampons.