delusional beliefs are false or irrational beliefs that persist despite evidence to the contrary. They are often associated with psychotic disorders, such as schizophrenia, but can also occur in other mental health conditions, such as bipolar disorder or dementia. delusional beliefs can impair a person’s ability to function and relate to others, and may cause distress or harm to themselves or others. Psychological theories suggest that delusional beliefs may result from cognitive biases, emotional disturbances, impaired reality testing, or abnormal brain activity.
