We've all asked Dr. Google about health problems, but sometimes you're likely to find overhyped pseudoscience instead of good advice. The Medical Library Association has put together a list of 100 legit sources so you can avoid Dr. Google's sometimes confused results.
The list includes sites like the Centres for Disease Control and Prevention, Medline Plus, and lots of hospitals and medical libraries. There are specific resources for kids' health, the elderly, drug information, and for specific conditions like stroke, allergies, and digestive diseases.
Not on the list, but also worth a visit, are the Cochrane Summaries, which tally the "yes" and "no" results from different studies on a given topic, like this one on whether cranberry juice prevents urinary tract infections (answer: probably not). This article from Vox includes a few more databases that keep track of similar questions, and some background on how these summaries are put together.
Take a look at the full list (the PDF version is especially handy) and you'll have easy access to some of the best answers on the internet for your health questions.