Oh, and this should really go without saying, but do not try to make someone feel better by complimenting their physical appearance, especially if they haven't brought it up.

This will hopefully already seem obvious, but if I hear one more medical or mental health professional tell me how pretty or beautiful I am as if believing that would solve all my problems, I am going to scream. It comes across as dismissive and patronizing at best, and often creepy and uncomfortable.