I noticed that my albino ball python is going into shed and he has 3-4 small reddish spots on his back that just appeared in the last week. He temps stay at 90 on the hot side and 76 on the low and his humidity stays between 50-70%. He has a very small hide that he insists on using but this doesn’t look like an injury to me. Sorry for the link but I haven’t figured out how to post pics yet...
https://drive.google.com/file/d/1Ob6NW5T8hxEmqvmnqDB7bWL4sxyCR8GP/view?usp=drivesdk