A friend showed me this YouTube channel. After the disgust wore off its actually pretty interesting. Lots of folks walk around with this stuff inside or on their body.
Had one removed similar to that except it was the stinky kind. My dermatologist sent me to the ER to have it lanced bc it was severely inflamed. Mine had a sack they had to remove or else it would come back. Had to keep a cotton ball with antiseptic in it for a day, then returned and Dr put stitches in. In stunk like a rotten animal when he cut it.