Correction: The original version of this article misstated the symptom checker's original launch date. WebMD, long the go-to for patients turning to the internet for an answer to mysterious symptoms, ...

We’ve all done it: You plug your aches and pains into WebMD’s Symptom Checker, see that it could be either “cancer” or “seasonal allergies,” and promptly close out the window and decide to ignore ...

So many of us play doctor with Google. A strange twinge here, a dull ache there—we type it in, skim through multiple health websites, shrug, and carry on. But what if your body isn’t just throwing out ...