7 strangest medical conditions

At this point, you're probably familiar with the most common health conditions, from diabetes to cancer to heart disease, and their risk factors. But how about a syndrome that causes you to suddenly start speaking with a foreign accent or a disorder that literally turns your skin blue? These rare health conditions affect people across the world. In fact, one in 10 Americans has a rare disease. Here are weird—but very real—medical conditions you should know about.