Help! Trapped betta, now with scale damage!

[MarkOne]

OK, bought my new male today, have setup in a new 7G tank by himself, and a fluval 1+ low level filter. He was in the tank an hour when I went to check on him, and he'd wedged himself between the filter and the tank edge!!
I removed the filter, but he seems to have silver patches below his eyes, where I presume he has scrapped some scales/skin off.
Help! What should I do please?!!

 

[RandomWiktor]

I would need a picture to see if he has lost scales; it is possible that is simply exhibiting a stressed coloration. The best you can do is keep him warm and relaxed with a good amount of cover for hiding in case he is stressed out. That aside, adding a medicinal amount of Aquarium salt will speed the recovery of any scale damage, and will help stave off infection. Good luck, and do keep us posted on his progress.

 

[MarkOne]

Thanks, I'll see if I can get a picture up. I've had the curtains closed in there since he was put in, and added some stresscoat.