Yes, it is possible for a psychotic or manic non-bizarre delusion to start with partial insight before it progresses to no insight and full psychosis. Delusions are false beliefs that are firmly held despite evidence to the contrary. In some cases, individuals experiencing delusions may initially have some awareness or doubt about the validity of their beliefs. This initial state of partial insight is known as "imperfect insight" or "delusional mood."
During the early stages of a delusion, a person may recognize that their beliefs are unusual or not widely accepted, but they still maintain a firm conviction in them. As the psychosis or mania progresses, the individual's insight may diminish, and they become more convinced of the delusional beliefs. This shift towards full psychosis or mania is often associated with a loss of touch with reality and a complete acceptance of the delusions as true.
The progression from partial insight to no insight and full psychosis can vary from person to person and depends on various factors, including the underlying mental health condition, stress levels, and the individual's support system. It is essential for individuals experiencing delusions or other symptoms of psychosis or mania to seek professional help promptly. Early intervention and appropriate treatment can improve outcomes and help manage symptoms effectively. If you or someone you know is experiencing delusions or any other mental health concerns, it's important to consult with a qualified mental health professional for assessment and support.