Tongue raised white outline under tongue . i notice it several weeks after oral sex.

See MD/Dentist ASAP: You need to see a dentist/ md immediately for proper diagnosis and treatment. Fortunately, the majority of tongue problems are not serious and most can be resolved quickly in some instances, though, a discolored or painful tongue or the floor of the tongue can indicate more serious conditions like thrush, vitamin deficiencies, aids, or oral cancer.

Check for hpv: It's possible you could be experiencing a condition called condyloma acuminata. The cause is one of the human papilloma viruses. The generic term is a genital wart. These can occur in the mouth and like to present under the tongue on the lingual frenum. I'd go see your dentist and refrain from oral sex until you figure out what it is.