You can add as many patient states to your patient scenario as you like, and can customize each to your simulation needs.
With the help of these states you can have your patient easily switch from one state to another either by manually clicking your way through states or by defining the trigger for the states to switch.
To add a new patient state open your patient from the Patients tab, and go to the "States" tab in the Advanced Mode.
Then just click the "+Add State" button to create a new state and type a name for it. Finally hit ENTER to save it.