What Causes Bleeding From Mole While Treating It?

Five days ago I had two biopsies on two moles, shave biopsies I believe, one on my forehead and one on my chest. They gave me instructions to wash, apply Vaseline, and cover with new bandages once a day which I ve been doing. What I noticed about both of them was the holes that were left were filled with some type of white scab-like material. The one on my forehead eventually fell out during washing but the one on my chest is still stuck in there and it doesn t seem to be getting looser. My forehead wound seems to be healing quite nicely but my chest one seems to be healing slower from what I can tell. truth be told I tried to coax the chest one out using some hydrogen peroxide and a cotton swab but stopped because it started bleeding from the treatment. Should I be worried or is this normal?