guba

[yura]

Zdrawstwujte! U menja takoj wopros. Na wnutrennej storone nizhnej guby obrazowalsja puzyrek prozrachnogo tsweta. Skazhite pozhaluisto, chto eto mozhet byt '. 3 mesjatsa bol'she ne kurju

[pes]

Most possibly, any from variants of a stomatitis or gerpeticheskaja an infection. Your description does not resemble a cancer of a labium. Seem (internally:-) to the stomatologist.