This patient had two blackheads on his back that were bothering him. One was quite large and hard like a pebble with a thin sac surrounding the pocket. When he would get massages it would hurt when pressure was applied. So we popped them out for him. Thanks to my patient for sharing his procedure. DPOW. Dilated pore of winer. Dermatology procedure. Dermatology Physician Assistant. Blackhead extractions. MrPopZit.