Lump below my ear lope near the backside of the jaw, is it a tumor?

it feels like a very smooth rock. its on my left side of my face below the ear lope, backside of the jaw, and my right side does have one. it is a tumor or something. its feel like the size of a marble. it is under the skin. it doesnt really look like a lump.it doesnt pop out, but i can feel it.