There is no skin inside the vagina, but hormone containing IUD's can cause a discharge or vaginal dryness
devices may cause a cervical erosion especially if they contain hormones. The hormones may cause the cervix
to evert out or changes in the lining cells of the cervix that lies outside in the vagina [changes in the transformation zone]. This may also occur during pregnancy
or use of contraceptive pills. However, the changes usually revert back to normal after stopping the drug.
You have already undergone a cervical biopsy
and feel that secretions are coming back to normal. Also Mirena acts for 5 years, so is your removal of Mirena due? If yes better get it removed as prolonged use after the suggested use period may lead to infections.
Hope this was helpful.
Don't worry as these are common issues. Take care and have a good day.