Search “red, itchy rash" and the Google results will send you into a full-blown panic. Avoid paging Dr. Google and ask a real M.D. instead. Facebook Messenger's new chatbot option allows users to contact HealthTap, a telemedicine startup. Once you explain what's going on, the chatbot gives you the option of seeing previous responses to similar questions or getting a personalized response from a doctor. You'll likely have to wait an hour or two to hear back, but the service is totally free.