Feeling under the weather, but not sure what's up? There are a couple of online sites that allow you to input symptoms, and voila! a list of possible causes pops up with suggested courses of treatment - stuff to do at home, as well as suggestions on when you should see the doctor.
The Mayo Clinic offers this free service at its site. Its "symptom checker" provides lots of information, including both treatment and prevention.
WebMD.Com also has a symptom checker. WebMD is an online site provided by a combination of physicians and other professionals. It is affiliated with MedicineNet.
Other online symptom checkers include Healthline, and About.Com, whose symptom checker uses information provided by Harvard Medical School.
For those of you interested in alternative medicine, or distrustful of standardized medicine, check out HowStuffWorks.Com, which provides not only a symptom checker but tons of info on ... well, how stuff works health-wise. Revolution Health also provides a symptom checker (but if you look closely, they are using the Mayo Clinic site).
Shown: Gabriel Von Max's Die ekstatische Jungfrau Katharina Emmerich, 1885