Before you go rushing off in a panic, take the temps and observe your snake.
As Ok said, Upping the temps and humidity especially if going into shed can't hurt.
I see you are keeping it on Aspen... which can be a bit drying in an aquarium set up. You might consider switching to Cypress or someother substrate that can hold the humidity better. (aspen can mold if it stays damp)
If you do think you have the beginnings Of RI , I have had great success keeping them on damp sphagnum and upping the temps to Low 90's.(covering most of the venting)as one of my reptile mentors had advised me. Most importantly, observe, but leave the animal alone... you want to remove as much stress so it can recoupe.
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"There is a fine line between a hobby and mental illness"
