Schizophrenia: Symptoms & Signs

Medically Reviewed on 9/10/2019

The symptoms of schizophrenia vary in quality and intensity from individual to individual, but delusions or a failure to recognize what is real is characteristic. The delusions of schizophrenia can cause hallucinations in sight (visual hallucination), sound (auditory hallucination), and/or touch (tactile hallucination). Other symptoms of schizophrenia include

  • disordered or
  • confused thought.

This can be associated with talking nonsense and disorganized speech. Both a decrease in social interactivity or being socially withdrawn and agitation are common. This can lead to other socially negative symptoms and unusual behavior.

Other schizophrenia symptoms and signs

  • Agitation
  • Confusion
  • Decreased Social Interactivity
  • Delusions
  • Disordered Thought
  • Failure to Recognize What Is Real
  • False Beliefs
  • Hallucinations
  • Hearing Voices
  • Nonsense Talking
  • Withdrawn Behavior


What's Schizophrenia? Symptoms, Types, Causes, Treatment See Slideshow

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Kasper, D.L., et al., eds. Harrison's Principles of Internal Medicine, 19th Ed. United States: McGraw-Hill Education, 2015.