If you meet someone after a long time, and see they have some pimples in their face/ gained some significant weight/ lose some hair or something else might have happened which might not be "aesthetic" in our societal standards. Why do you think pointing that out to the person is an appropriate thing? They would know their current state. They might be having some hard time, or some medical condition. Stop pointing and stating the obvious, specially if y'all are meeting after a long time.

One of my peers gained some significant weight, and someone pointed it out in a way that was utterly mocking. The person at the receiving end was genuinely hurt. I too felt quite uncomfortable.