It looks like the skin is intact (there is not cut) just tender skin. I'd just leave it be and find what ever caused the scales to pull loose, heavy hides are a possibility or a sharp edge some where I'd finger test everything no matter how small and sand down any sharp or hard edges I found. (1000-1600 emery paper works well for most things) and keep en eye on the opening to make sure it isn't changing. If it does it is time for a vet.
Since you are new it is a good idea to find out who the herp keepers take animals to locally and I would bite the bullet and make a visit. The reason is some vets will not see an emergency that they have not seen already. No new emergency clients. Fecal exams are never a bad thing so I would get a check up and fecal just as an introduction. Ask questions a good vet will listen and answer so you understand and will admit when they don't know. They will work with you. The horrible vets make up answers and worse treatments based on mammals avoid them at all costs.
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