I checked in on my JCP this morning, as I always when I leave for work, and noticed that my JCP's upper lips and lower jaw seem to be swollen. Now, it has been uncharacteristically hot over the last few days (and as a result his enclosure may have been drier than usual), but other than that I can think of nothing that would have caused this. He last ate one week ago, and had no problems during that feeding. His appearance seemed normal until this morning.
I didn't have time to examine him more closely this morning, but do plan to do so first thing this evening. I know mouth-rot is something that I should consider but find that somewhat unlikely.
Does anybody have any advice or suggestions? Any help would be greatly appreciated.

