Can an epidermoid cyst grow in the bellybutton?

Yes they can, I have gone to my family doctor and have been diagnosed with an epidermoid cyst in the lower part of my belly button. At first it was a purplish-blue color and recently it got infected and flared up into something that looked like a boil. An epidermoid cyst is basically a cyst formed in a pore in between your skin. Hence epidermoid comes from epidermal. They aren't common but are very possible.