Chronic pain is pain that has gone on for a long time (at least from 3 to 6 months) and typically results from long-standing conditions or damage to the body and has emotional, sensitive, cognitive, and behavioral components (1,2). The source of chronic pain is still largely unknown. However, a growing body of evidence brings up a complex relationship between chronic pain and personality characteristics (3,4). For instance, neuroticism correlates positively with the intensity of pain (5). Eysenck's factor theory of personality assumes that emotional stability is the opposite pole of neuroticism,