I am a teenager who noticed a small bb sized lump under the skin. when i noticed it, it wasnt painful, i just noticed it one day. my mom took me to the doctor and he said if it didnt grow it was fine. i wasnt worried for a while. a few months later it is starting to get a little painful. what should i do?
I'd suggest you see your doctor again.
Without knowing exactly what it is we can only guess. There are usually no lymph nodes in that area (they can swell at times). It may be a lipoma (although they are usually painless) or a sebaceous cyst (oil gland).
Get it checked just to be safe.