Schizotypal Personality Disorder: Symptoms & Signs

Medically Reviewed on 11/12/2019

Schizotypal personality disorder is a personality disorder as well as a schizophrenia spectrum disorder that produces a certain pattern of odd, eccentric feelings, behaviors, perceptions, and ways of relating to others that significantly interferes with one's ability to function.

Signs and symptoms of schizotypal personality disorder include holding unusual beliefs, paranoia, extreme social anxiety, lack of close friends, rambling or odd speech, lack of emotion, and inappropriate emotional responses. Other associated symptoms and signs can include strange thinking or behavior, acting suspicious, or being uncomfortable with intimacy.

Cause of schizotypal personality disorder

Doctors do not understand the exact cause of schizotypal personality disorder. It likely involves a combination of genetic and environmental influences.

Other schizotypal personality disorder symptoms and sign

  • Acting Suspicious
  • Being Uncomfortable With Intimacy
  • Extreme Social Anxiety
  • Holding Unusual Beliefs
  • Inappropriate Emotional Responses
  • Lack of Close Friends
  • Lack of Emotion
  • Paranoia
  • Rambling or Odd Speech
  • Strange Thinking or Behavior


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Jameson, J. Larry, et al. Harrison's Principles of Internal Medicine, 20th Ed. New York: McGraw-Hill Education, 2018.