Poor Emeric...

About a week ago Emeric shaved the skin off his finger with my razor. It looked like it was healing and had scabbed over and then this morning I noticed it looked like the skin was peeling and there was a hole in the middle of it. It's gotten a bit worse looking throughout the day and he won't use it. He has been really crabby and I know it's hurting him. :( I think it's getting infected because I can't quite figure out why the hole is there. It wasn't any kind of puncture wound.