First, welcome to PT. Sorry your first experience with us is medical related.

Now, on to the medical issues...does it look like a scratch the kitty gave itself? Or, did it get caught somewhere? Do you have another kitty that might have inflicted the wound? Is this an indoor only kitty? Does it look raw, infected, etc? You could always try a little topical anti biotic on it....not too much, just enough to coat it a little.

Probably like you, I would take him/her to the vet. Just in case. Welcome again, and hopefully it is nothing at all.