Let them see it
Cotard Delusion is a rare, fascinating, and frightening disorder in which a person irrationally thinks they are dead, dying, or decomposing. In many cases, people will think that they do not fully exist or are immortal, in spite of their feelings of death.
Considered a delusion of negation, individuals suffering from Cotard Delusion will often deny that they are completely intact and will feel that parts of their body are missing. The delusion is typically related to depression, schizophrenia, and psychosis.
Formerly known as manic depression, bipolar disorder is best known for its varying periods of mania and depression. Both phases are equally harmful, as someone experiencing mania is more prone to make dangerous and risky decisions while depressive bouts can lead to self-harm and suicide.
Often related to insomnia and personality disorders, between 2.5 and 3% of Americans are expected to have bipolar disorder at some point in their lives.
Eerily expressed through this drawing, the Capgras delusion is a delusional misidentification syndrome in which somebody believes that a pet, friend, spouse, or other close family member has been replaced by an identical impostor.
Typically associated with paranoid schizophrenia, Capgras delusion can also affect those with dementia or brain injury. Historically, it was considered an exclusively female disorder.