What Causes Pea Sized Lump On Labia Majora?

Hi im 22 and have a pea sized lump in my labia majora... There is no head or visible signs of it but I can feel it. I don't think it is a cyst at all. It does feel like the other side but just larger and rounder in one spot. I was wondering if this could be just inflammation or something? I don't if this is normal so I am too embarrassed to go see anyone. It doesn't hurt and I think its fine but I just want some advice to be sure.