A 32-year-old male presents with sores on his face and arms….

A 32-year-old male presents with sores on his face and arms. He appears malnourished, his teeth are in poor repair, and he admits he has not slept in 72 hours. He is picking at his skin during the interview. These physical signs are most indicative of chronic use of:

A 30-year-old female patient is admitted to the psychiatric…

A 30-year-old female patient is admitted to the psychiatric unit. During the morning shift, she tells the primary nurse, “You are the only one who understands me; the night nurse was incompetent and cruel.” By the afternoon, she is shouting at the same primary nurse, accusing her of being “uncaring” because the nurse denied a request for an extra snack. This defense mechanism, common in Borderline Personality Disorder, is known as: