It's not a disease, and it's not treatable, it's meant to be helped by other people. Just like any decent person would help someone in a wheelchair, and some people just wouldn't give a shit about them.
It's a terrible mental illness for the people who actually have it, you wouldn't really know what it feels like to be labelled with it, one minute, people accepting you and adapting, then another time, people just fuking taking the piss out of, "oh yea, it doesn't mean anything". doubled with autism, it isn't fucking nice.