This article from 2000 about how the psychiatric profession plus the internet may create new body-imaging disorders is very well worth a read
Why do certain psychopathologies arise, seemingly out of nowhere, in certain societies and during certain historical periods, and then disappear just as suddenly?
A friend sent this article from 18 yrs ago, comparing apotemnophilia (desire to amputate a limb) with gender dysphoria. It wouldn't be written like this now, and in another decade, it probably couldn't be written at all. Will LGBTQ add a letter for amputee?
Fascinating story from 2000 about a group of healthy people who identified as amputees and sought, and found, help from doctors in making their bodies match their felt sense of identification: