With Rejuran, is it possible that the changes you feel yourself might take longer than the reactions from those around you saying your skin has improved?

I sometimes hear stories about how, after a skin procedure, the person themselves doesn't really notice the changes because they see their face every day, but the people around them are the first to notice.

I thought that people who see it every day might not really notice the very slight changes.

I am curious if, for procedures like Rejuran that improve the condition of the skin itself, the changes observed by others might differ from when the individual feels the effects.