i looked at my betta and noticed that he has two scales lifted right behind his eye. He acts normal and water is clean. The brown is tannins. I will leave a picture, sorry if it's no good though he moves way to much to focus properly.
If you're concerned about dropsy, you can go ahead and order some kanaplex just so you can have it on hand. I had to get it shipped to me when my fish had Dropsy, and there was a mail delay and a lot of things went awry with the delivery, and you don't want to be waiting on that. Peace of mind, and I think it's like $7 on Amazon if you have access to it.
Edit: I forgot to give my opinion, it doesn't look like Dropsy. Normally dropsy scales begin to occur behind the gills, not as far up as behind the eyes.