Physicians generally draw a line: Public professional pages – focused on medicine, similar to those other businesses offer – are catching on. Some might email with patients. But doctors aren’t ready to share vacation photos and other more intimate details with patients, or even to advise them on medication or treatment options via private chats. They’re hesitant to blur the lines between personal lives and professional work and nervous about the privacy issues that could arise in discussing specific medical concerns on most Internet platforms.