The Internet is the greatest tool we have for getting information. You can find information about pretty much anything online, from medical diagnoses and treatment, to hobbies and collectibles, even to tracking down an old friend.
However, in some ways the Internet can also be your worst enemy, as there is also a lot of
wrong information to be found. You don't have to have any particular credentials in order to post something to the Internet — all you have to have is a username and password for a forum, or perhaps the money to pay for a domain name and hosting account.
For instance, if you always feel tired, no matter how much sleep you get, a little online search might reveal that you could have
sleep apnea, a condition where you actually stop breathing at intervals during the night. Obviously, this interrupts your sleep patterns and negatively impacts the quality of rest you are getting.
A little more Internet research reveals that there is a way to ensure you still get a good night's sleep: with a
sleep apnea machine, also known as a CPAP machine. This machine has a mask that you strap to your face to cover your mouth and nose, so that it can blow a light but continuous stream of air down your airways all night to prevent them from closing (which is the usual cause of sleep apnea).
If the idea of breathing out against a constant pressure makes you a little nervous, you could do a little more research and discover that they also make something called a
BiPAP machine, which has two different pressures: one for when you breathe in, and another, lesser pressure to make it easier to breathe out.
However, if you keep researching the subject, you are bound to run across some pretty scary stories. I remember reading one guy's story about how bad his sleep apnea was — pretty much nothing worked. Reading these kinds of things can quickly discourage you and lead you not to seek treatment, even if in reality you case is very mild and would actually be very much improved with treatment.
And of course, there are tons of incorrect things that you could come across in your research, too: Old wives' tales and home remedies that just don't work, and could lead to wasted time and a lot of frustration.
So be careful what you read online! Your best bet is to stick with sources (i.e., websites) that are respectable and well-known. For instance, Wikipedia probably isn't your best bet, though it can be a good jumping-off point if you utilize the links and sources listed down at the bottom of the page!