Can someone help identify this?

I will do my best to describe this. This "growth" is on the underside of the mouth of my Python. She is about two years old, and the growth was not there last week. It is a swelling that is hard when you touch it. At the top of the swelling it looks like there is a scab. There are three more much smaller scabs toward the front of the mouth. There is no mouth rot, and I do not see any evidence of parasites, mites, etc in the cage. The snake is in a rack with five other snakes and none of the other snakes have a problem. I do not feed live prey. There is some old dead skin in the area, which is hard to get off. Any help would be greatly appreciated. Photos attached. Not the best quality but the best I could do with one hand.