To let you know, Q-Tips work wonders. I use them when i have to clean substrate out of mouths or prop a mouth open. Use the cotton ends to wipe anything off the lips and use the stick part in the middle to hold open the snakes mouth.
As to your question, might be, might not be. Need more info like hot side temp, cool side temp, humidity, etc. My advice going into this blind is bump the hot side temp to 90F and cool side to 82F and humidity up to 70% for a week and see if it goes away.
I personally keep my BP at 78-84F overall ambient cage temp depending on room temp and time of year and 88F hot spot with flexwatt and humidity at 70% or so. Must be working as she figured out to slide open her cage door and venture around the house so i had to actually use a cage lock for her lol.
And if you are using the dial type gauges, ditch them. They are 99% of the time wrong. Buy a digital unit from Acurite which arent 100% accurate either but for $10, they are close enough and off by maybe 10% humidity and 3-5F.
And honestly, if you are really worried about, take him to the vet. None of us can diagnose your snake over the internet.
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