Thanks for asking the query,
According to your clinical symptoms i suspect that you might have developed an ulceration inside your upper lip
, this can also be due to bacterial or viral infections particularly herpes
I would suggest you to visit the Dentist
get a thorough checkup done to determine the diagnosis and treatment plan.
Take lukewarm saline rinses and antispetic mouthwash gargles.
Apply mucopain oral ointment topically over the affected area.