People with Morgellons actually have an itch, we just don't know what the cause is or how to stop it; and they are resistant to any psychological treatment that aims to reduce the itch because they think you're accusing them of making it up. We do know that Morgellons is not any insect or alien creature.

I have more sympathy for people with Morgellons than for the electro-sensitives (apart from the fantastic amounts of stigma about mental illness they generate - both from people looking in but also from themselves.)