Culture does drive people's sense of self and certain disorders. I'm not going to explain it well, but it's generally well accepted that eating disorders, for instance, are culturally driven. Many different medical diagnoses, like hysteria, or multiple personality disorder, have once been popular and then eventually disappeared. Practically everyone I know self IDs as having ADHD and/or autism. I do see cluster B personality disorders becoming more common as social media encourages everyone to obsess about their self-image and their identity, all the time.