Literally. She suspects there is a cyst underneath it. And so she starts to dig in deep to remove the cyst. "This was a little blackhead that is kind of more like a cyst," she says in the video.

In a new Instagram video, Dr. Pimple Popper—aka dermatologist and TLC host Dr. Sandra Lee, MD—asks popaholics to pick a favorite: blackheads or cysts.

In one of her most popular YouTube videos of all time, Dr. Sandra Lee, MD—aka Dr. Pimple Popper—mistakes an epidermoid cyst for a blackhead at first.

Dr. Pimple Popper found a hair in the second cyst, perhaps an epidermoid cyst , a slow-growing kind that may results from an injury to the hair follicle during an acne breakout.

Watch Dr. Pimple Popper remove a 9-pound lump that was growing on a man's arm for nearly a decade Dr. Pimple Popper reveals her nighttime skincare routine, and it only includes 3 steps ...