Is it possibly a pulled 'stitch?" can you e mail this to your Vet clinic for Vet to see? Make sure she isn't running jumping around, if licking picking place cone collar on her head. There's redness you don't want infection, I would mention to the Vet.
While it doesn't look great, it doesn't look terrible. There does seem to be something wrong with it, though. I'd definitely send these to the vet or take her in for a quick re-check.
How long has it been since the surgery? It looks like a keyhole incision, stitched so the stitches turn inside. . .it's kind of a fancy way of doing sutures :lol3:. Was it done at a spay clinic or shelter? I'm guessing it was because of the tattoo. They like experimenting with the latest ways of doing incisions and sutures. It looks good to me.