The feeling and belief that one is being targeted or is a focus of negative or untoward actions, overt or covert, from others. The affected individual expresses a concern that people are in general against the individual and are engaging in subtle behaviors to make things difficult for them. The origins of such thinking may arise from real events and become amplified over time. Paranoia may also arise in the absence of any action or interaction between the person and their environment. The phenotype is Paranoia (HP_0011999, a Human Phenotype Ontology identifier).