So I took my ball python out today for the first time since Saturday (I fed him Sunday and gave him over 60 hours) and I noticed that a large portion of his belly was a pink shade with some odd, thin orange lines that were occasionally visible going down the center of the pink area of his belly. I have Aspen as a bedding (humidity is normally in the upper 50% to mid 70%) so I don't believe it's from stainage or even scale rot, but I'm still concerned. I have the thermostat probe for the UTH set at 90° and I turned it down to 89° just in case, but he constantly stays inside his warm hide so I'm wondering if prolonged exposure to heat caused it (both hides are identical).

His last shed with me was 2/21/2020, a month after I got him, so I'm wondering if this is a pre-shed pink belly that I just caught on to that's working its way up his belly or something. The pink area seems to disappear and the orange lines become barely visible when he flexes his scales in and he shows no sign of discomfort when I touch the pink area. He doesn't smell burnt, the scales don't feel scabby or rough and he doesn't seem uncomfortable when he moves, but I don't want to sound too confident.

I would provide a picture but my phone and my lighting are both trash and the area won't show up on camera.

Any and all helpful feedback is appreciated!!