@Ornamento said in What's this brightness around the eyes?:

it was all around the eyes, and it made disappear a bit the bags. It was like a sort make up.

vitiligo around the +eyes ?
It could be vitiligo (no melanocyte to color the skin). Not sure because the description given doesn't match with brightness white. In vitiligo it's rather pale white / light brownish skin (absence of brown color). We don't really know why.
https://my.clevelandclinic.org/health/diseases/12419-vitiligo
PS: It's difficult to say yes or no. Not sure before seeing a dermatology practitioner.
usually, it doesn't disappear and comes back afterwards.