It does sound like either an infection (possbily scale rot) or an irritation, what's his cage set up like? If you have a good herp vet he should be able to help you out with what you need. Are you keeping both your snakes in the same cage or are they separate? Until you see the vet to find out what it is, make sure you don't expose your healthy one to it.
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Tosha

"Stupid is forever, ignorance can be fixed." Don Wood

"Of course, that's only my opinion...and I believe I am God." =) Chris Bianco

7.33.0 Ball Python (Harry and Fluffy and gang)
1.0.0 Angolan Python (Skywalker)
0.0.1 Green Tree Python
0.2.0 Feline (Pippen and Pandora)
0.0.1 Dessert Tortoise (Pope John Paul)
2.2.1 Fish (1,2,3,4)
0.0.0 Pool skimmer rescues for this season

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