Skin problems...

[snakepeter]

Hello to all....

this in my first post over this amazing website, unfortunatelly not very possitive...
One of our corns we bought few weeks ago showed up some skin problems. I have no idea what happened with the snake, as it`s feeding and doing just well. This "blister" looked full of some liquid... After shedding of the snake the "blister" was gone, but area where it was presented is still a little bit damp/wet....

Could someone help me what it could be, and if there is possibility how to treat it? I am attaching 2 pictures which can hopefully help explain what I mean. I am sorry for my English, but it isn`t my native language, and I still have a lot to learn ...