going through this now with my little pied boy. i checked on him the other day and his belly was soo pink! confirmed his husbandry was totally fine. i checked on him yesterday and it has dulled a bit. now i'm getting ready for a shed!
Thanks for the replies everyone! He seems to be more of a shy boy than usual so I guess he is going into a shed!
It looks like shed to me. He might be more shy because his eyes are probably fogged over. Make sure to bump humidity and let him be until he finishes shedding.
1.0 Normal BP
1.0 Mainland Reticulated
1.0 High lines Red Tail Boa