Nam et ipsa scientia potestas est.
Knowledge is power. Francis Bacon
Here's a great website for those who know they don't feel well, but haven't any idea of what might be wrong. WebMD offers this website free to anyone who wants to know more about what's physically troubling them, and it's simple to use.
You just start here, then click on Male or Female to begin. Select the part of your body which is having problems, and just continue answering questions and narrowing it down.
There's many more interesting topics on this medical website, so browse a bit and see if any are helpful to you.
And in a completely different direction, thought you'd all laugh at this photo below as much as I did!
Words of Wisdom.