what kind of rules are they so I can read more on them?
There are special rules that help you keep your cash benefits and Medicare while you test your ability to work .We call these rules " work incentives "
and what can cause my disability to get taken away if they review?
Two things can cause us to decide that you are no longer disabled and to stop your benefits.  if you work at a level we consider " substantial"  or if we decide that your medical condition has improved to the point that you are no longer disabled .