The Joker, or Jack Napier, has been casually diagnosed with a plethora of mental illnesses,

The Joker, or Jack Napier, has been casually diagnosed with a plethora of mental illnesses, such as schizophrenia, dissociative identity disorder and post-traumatic stress disorder. But mostly he’s referred to as just “crazy” and “insane”. Heath Ledger referred to him as “a schizophrenic clown.”Aug 24, 2017 Source: Youtube