Paranoia is a pattern of thinking seen in some people that can become a persistent mental health condition. It is marked by intense feelings of anxiety and excessive fear, and is often linked to fixed, false beliefs known as delusions.

Typical experiences

People who are paranoid commonly interpret everyday events as threats. Examples include believing that others intend to harm them, feeling constantly watched by cameras, thinking that a specific group is following them, or fearing that others can read or control their thoughts. These ideas are not merely worries: they are experienced as real and convincing, even when they conflict with available evidence. Such thinking is frequently driven by heightened anxiety.

How it differs from other fears

Paranoid ideas differ from simple irrational fears. For instance, someone with a phobia may fear an object or situation intensely but does not typically attribute the fear to a deliberate action by others. In contrast, a paranoid person often assumes hostile intent and may make accusatory or explanatory statements that turn coincidental events into evidence of persecution.

Cultural and diagnostic considerations

Beliefs rooted in a person’s cultural background or religion are not automatically considered paranoid. Clinicians take context into account and will not label someone diagnosed with paranoia solely because their beliefs match widely held religious or cultural doctrines. A diagnosis requires patterns of thought that cannot be better explained by those shared beliefs.

Associated conditions

Paranoid thinking often occurs alongside other psychiatric problems. It can coexist with other thought disorders and with various mood disorders.

In everyday speech, the word "paranoid" is sometimes used loosely to describe ordinary suspicion or worry—for example, calling someone "paranoid" when they worry that a teacher dislikes them. Clinically, however, the term refers to more persistent and impairing patterns of mistrust and fear.