What could a small purplish red bump on your butt be?

Answer 1

Genetic remnants of a tail. While most humans aren't born with a tail, some actually have a small tail when they're born and it is usually removed before the baby is taken home.

AnswerThe coccyx is the scientific name for the tail bone. The tail bone sits right at the top of the "butt crack." The coccyx is made up of a few small segments. Through an early injury or a malformation, the coccyx can present as a lump. AnswerIt could be a pilonidal cyst.

Answer 2

A boil - it's just a tiny skin infection.