According to the psychosocial vulnerability model of the relationship between hostility and health,

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The psychosocial vulnerability model suggests that hostility is not directly related to poor health outcomes, but rather that hostile individuals create a stressful environment by mistrusting others and scanning their environments for potential mistreatment. This leads to increased physiological arousal, such as elevated heart rate, blood pressure, and stress-related hormones, which can increase the risk for coronary artery disease. Hostile individuals may also have smaller social support networks and may take worse care of themselves/their bodies, but these are not the primary mechanisms by which hostility is thought to impact health.

According to the Psychosocial Vulnerability Model of the Relationship Between