Yes it appears to be above the vent, most likely in the colon area. I can't see it but I felt it through the belly scales. It feels pretty hard and doesn't want to move at all. I'll give the oil thing a try. When I checked her today the swelling seems worse and now there is a purple/red color to the swollen area. I'll give the oil a try. Hopefully that will work because otherwise, it's not looking too good for her. If it is a urate mass, any idea what could've caused it? dehydration/low humidity maybe?