TMI question, pimple or in grown hair? No picture

I noticed I have a hard bump on the outside of my vagina, up where the hair grows (don't know the word), above the lips and all. Don't know if it's a pimple or an in grown hair? I don't shave, can you still get in grown hair? I never had an in grown hair before, and never had a pimple down there either. It hurts a lot. Thanks