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3 major causes for SAD

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Physiological factors

  • Genetic factor


  • hyperactivity of the amygdala in the brain that produces emotional responses (especially fear responses)


  • Imbalance secretion of neurotransmitter in the brain

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Psychological factors

  • Personality prone to anxiety, introversion, shyness and lack of self-confidence

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External environmental factors


  • Experienced unpleasantness or fear in social situations

  • Being ridiculed, bullied and rejected as a child

  • Growing up in an overly controlling and protective family

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