Help! i have some sort of boil on my inner lip. what can i use for this?

Size, Location...: It is hard to tell without seeing its size, and its location ; duration, etc. With that being said, the lip contains many small glands that secrete fluid, and when the fluid gets clogged, it may cause a boil-like swelling. This may rupture then disappear, or continue to swell and may become uncomfortable. Keep the area clean and see a dentist to get it checked.

Go to dentist: This needs to be evaluated and treated as needed by a dentist. You should not treat this yourself.