Blurry but looks "pink"?
Should not be a problem. Like was stated probably pulled off a scale.
As long as you keep clean and once a week some "orig. Neosporin" should do the trick. This may take up to and even beyond 6 months but will heal and will look normal.
Now I used a Q-tip with a very small amount on the area , not a glob of it and rubbed it in.

No worries just keep an eye out on it and if it really starts to look funky or you see ooz / puss then see a vet. But otherwise it will just take time..
Good luck.

Oh this is all based off od this is a missing scale hard to tell from the pic..

Hope this helps