anosognosia

noun

ano·​sog·​no·​sia ˌa-nō-ˌsäg-ˈnō-zh(ē-)ə 

: an inability or refusal to recognize a defect or disorder that is clinically evident

Mrs. M. 's form of anosognosia is even more extreme: she not only flatly denies she is paralyzed, she refuses to admit that the limp limb on the left has anything at all to do with her.

—James Shreeve, Discover

A prominent feature of schizophrenia and bipolar disorder is anosognosia, a sick person's unawareness that he is sick.

—Algis Valiunas, New Atlantis

see anton's syndrome