Painful bump on pubic area it is about the size of the tip of your middle finger no color hard just very painful what could it be?

It as a "Sebaceous Cyst". Basically, it's a pimple gone bad. He said this is a common place for them, since the area can get sweaty and oily and doesn't get much exposure to air.

Caused by blocked sebaceous glands, swollen hair follicles, and or excessive testosterone production, a sebaceous cyst is a closed sac below the surface of the skin that has a lining that resembles the uppermost part (infundibulum) of a hair follicle and fills with a fatty white, semi-solid material called sebum.