Originally, there was r/TrueTrannies, which was fairly active for a small sub of maybe a thousand members. TT started getting overrun with spam, and the mod/creator was absent, so users broke off into their own subs ... r/Transmedical and r/Truscum.

r/Truscum took off because it was the first created and advertised, and the term "truscum" strikes a nerve among trans people who are being excised from their own community by radical activists.

Both believe you have to have dysphoria to be trans, and dysphoria is a medical condition - the reasons can vary though, even among their users. Generally speaking, dysphoria is believed to either be a mental health issue or a biological issue (brain/body mismatch), and typically transition is the cure. They don't all believe you have to transition though, because again, medical condition. ... not all medical conditions get cured, some are just accepted and lived with.

AHS and Reddit believe whatever you identify as is real, and dysphoria and medical conditions are not necessary (and may even be ableism or hate speech). They hate r/Truscum because it exposes their lies and deception. That sub will be banned the moment they can find even a slight reason, and believe me, AHS tries to invent reasons whenever they can.

Disgusting.