A couple months ago, I had oral sex with this girl and a couple days after my lips were burning all over, they were also dry and sticky. This over time became less severe with uncomfortable stickyness making my lips irritated and causing me to lick them and gain a small red lining underneath my bottom lip. Another problem I have is that my tongue is coated strongly white. My doctor took a swab and it came back negative for thrush. Ive done my research and will soon take some multivitamins to see if that helps. My doctor seems to not worry much about the white tongue or irritated lips and told me to "Use lip balm". Which helps temporarily, but I never had this problem prior to that night