A visit to the doctor sometimes involves getting a prescription or a poke with a needle. But what happens when a doctor visits you with a text message or a facebook poke?

This week on White Coat, Black Art we look at social medicine -- when health professionals use blogs, tweets, texts and other forms of social media as a way to keep in touch with their patients.

Some doctors even become facebook friends with their patients. Listen to Dr. Jen Dyer's thoughts on the matter. She's a pediatric endocrinologist and public health researcher in Columbus, Ohio: