Paranoid schizophrenia is the most common example of schizophrenia that features paranoia, delusions, and an altered perception of reality. You might hear voices or see things that don’t exist, or experience paranoid thoughts and delusions that disrupt your functioning in daily life. However, paranoid schizophrenia is no longer a recognized diagnosis and is more likely to be referred to as “schizophrenia with paranoia” by mental health professionals.