?

He's a 3 years old male boxer and a couple days ago I noticed a big thick black scab on the center of his left cheek that he won't let me touch when he's awake. I gave it time hoping it would go away, but it has stayed the same, if not gotten bigger. Before this bump/scab formed, there used to be a very thick and short whisker, so I think it may be an ingrown whisker or something.

He has also had a similar incident where he developed a small cyst-like bump near his ear that grew big and just disappeared, but I assumed it was scar-tissue for her was in a fight not too long ago.