Googling a headache rarely settles anything — a Microsoft study found it escalates common symptoms into fear of rare diseases, and of the quarter of searchers it pushed into a doctor’s appointment, most turned out not to need one

This is one study, not settled consensus, though the pattern it describes has kept turning up in the research since. The search results themselves did a lot of the work. Nearly nine in ten reported at least one instance where a symptom search had escalated their concern toward something serious. Read plainly: for roughly one in four people who search their symptoms, the search itself becomes the reason for the appointment. What none of this shows is that searching symptoms is inherently harmful, or that the fix is simply to stop.