Paranoid delusions - these may cause the person with psychosis to be unduly suspicious of individuals or organizations, believing them to be plotting to cause them harm.
Symptoms of paranoia and delusional disorders include intense and irrational mistrust or suspicion, which can bring on sense of fear, anger, and betrayal. Some identifiable beliefs and behaviors of individuals with symptoms of paranoia include mistrust, hypervigilence, difficulty with forgiveness, defensive attitude in response to imagined criticism, preoccupation with hidden motives, fear of being deceived or taken advantage of, inability to relax, or are argumentative.