Bimmer,

I am not sure if this is slight scale rot or just rubber scales but I had the same thing happen to two balls over here. The snake is perfectly fine here is the treatment to help heal. Apply some neosporin to the spot. And make sure you replace your substrate with Newspaper/Paper Towels. It is essential to get the snake on newspaper and apply regular neosporin with no pain reliever. This should clear up in a few sheds!