[drache]

can you post a photo?
I've had a couple of snakes that had what seems a lot like what you describe and I've been able to get them back to normal with just extra enclosure maintenance and a damp hide
it's important that their enclosures are kept clear and dry
but adding a damp hide seems to speed up the resolution of this condition
I did once look at one of the lesions with a magnifying glass and could see that not only were the scales sticking out - they were also damaged
it seems to be something like blisters or scale rot
and I don't think it's communicable