Large Bump

Ka

I have a bump on the lip of my vagina near my inner thigh. It’s under my skin and doesn’t have a head on it like pimples do. It’s growing and probably close to the size of a grape. It’s very painful when you touch it and it feels hard under my skin. Does anyone know what this could be? I’m on vacation right now and can’t see a doctor but i will when i get home if it’s still there.