tmi what wrong with my throat?

its hurts when i open my mouth too wide or yawn etc. i wondered what it was so i took a picture and saw this on the side of my throat. i do smoke cigarettes im only 20 but have been smoking since i was 15 (not sure if smoking has anything to do with it just throwing that out there) do i need to see a doc? it does not hurt when i eat or drink. it also itches.