
I would worm her just now to be safe. I wouldn't be worrying about buyers are really she will be out the equation a a possible purchase of anyone until you have really ruled out any potential issue. I would get the vet to check her anyway and have it checked over.
Sometimes they get a bit sore there are you get a bit inflamation. I have had this before. Almost like a little blisters.
Fingers crossed it is nothing too much to worry about..