It's his skin alright. I just saw him shedding a lot on his hind legs.
This is him, I'm still kind of worried because he seems to look a little swollen. I've always thought it's his weight but I only found out now that swellings might be water retention that signifies more serious problems

Maybe the blinking was a symptom of water retention in the eyes

Does he look normal to you? When I tip him downwards his 'fats' goes down to the lowest point. His 'swelling' is not sudden though.

And his leg area...

This is my female turtle. She used to be malnutritioned before our vet introduced us Mazuri pellets. We've been feeding them both the same amount but my male turt just seems to grow more and more because I guess the poop he eats contributes to his overall food intake
