Anosognosia: Awareness of Illness

Awareness of illness concerns whether someone recognises that changes in perception, thinking or functioning may reflect a health condition. A person may notice that life has become difficult but attribute the cause entirely to outside events. Another may accept a diagnosis while understanding some symptoms differently from their clinician.

Anosognosia describes impaired awareness of an illness or its effects. In schizophrenia, awareness can vary across symptoms and over time. It is not equivalent to a deliberate refusal to accept obvious facts, and disagreement about treatment does not by itself establish anosognosia or an inability to make decisions.

Awareness is not an all-or-nothing quality. It includes recognising difficulties, interpreting their cause and appreciating possible treatment needs. These components can change independently. Assessment asks what the person believes is happening and which explanations they find plausible. Previous experiences with services, stigma and communication also influence the discussion. A respectful approach distinguishes genuine uncertainty or disagreement from impaired awareness. Useful care can begin with shared concerns, such as sleep or distress, even when the illness explanation is not shared.

Recognition can develop through noticing a pattern rather than accepting a label immediately. Someone may observe that sleep loss precedes distress or that a treatment helps an unwanted experience. These shared observations can support care while explanations remain different. The clinician’s task is to build an accurate understanding with the person, including areas of agreement and unresolved interpretation.

Further reading: National Institute of Mental Health.