What Causes Skin Lesions Like Lumps With Bleeding?

I WORK WITH A GIRL WHO IT SEEMS HAS A PROBLEM WITH PICKING HER SKIN SHE HAD HUGE LESION LIKE BUMPS ALL OVER AND SHE PICKS THEM UNTIL THEY BLEED AND THE SIZE THEY ARE A REGULAR BANDAID JUST BARELY COVERS THE WHO THING MY QUESTION IS DO YOU KNOW WHAT IT IS AND IF ITS CONTAGIOUS?