The so-called cancer personality refers to individuals with certain personality traits that are prone to tumors, and these personality traits are called cancer personality. Cancer personality has the following seven characteristics: 1. Individuals are more introverted, good at sulking but do not like to vent their anger. 2. 7.Fear of competition, always easy to escape from reality, in a vain attempt to use the appeasement method to achieve a balance of the psyche.