With the proper treatment you can prevent wounds from healing quickly, and it's pretty recent, so I think he took out the stitches and peeled it open with his nails.
To be hones't I don't have a lot of medical knowledge myself. But Jerid is a genius plastic surgeon, so I figured he can do that kind of thing.
I'm doing research on weird surgical procedures, it's pretty funny. 

Check [url=http://www.buzzfeed.com/adamellis/bizarre-plastic-surgery-procedures-that-will-make-you-say]this shit[/url/. It's hilarious!

If you guys have suggestions or idea's I'd love to hear them.