It's the same procedure for both areas. Unless the doctor is taking something rather large, they many times do not stitch up the area. A punch biopsy is about 5mm in diameter. It takes a nice little core out and does not require closure for the most part, this is sometimes a function of where the punch is taken from and the vascularization of that area. Obviously anything that has the potential to bleed a bit will get a single stitch in it to help it heal. When they just leave it afterwards, this is called healing by secondary intent. The new tissue granulates in from the deepest areas and sides of the wound and it just closes up on its own over a while.

Brian, stage 4 oral cancer survivor. OCF Founder and Director. The first responsibility of a leader is to define reality. The last is to say thank you. In between, the leader is a servant.