Let's take a look:

U.S. Secretary of State Hillary Clinton is being treated for a blood clot. Doctors say it was indeed life threatening. But the question is...just how common are blood clots? More than you might think. Blood clots are more common than you think and there seems to be one overriding factor and that's inactivity. Take, for instance, hip or knee replacement surgery.

One study found that after such surgeries, blood clots in the legs of patients that produced symptoms was a whopping 34%. Add in those clots that didn't produce symptoms and that number climbs to a whopping 51%. It has a lot to do with inactivity. Let's take a look at some of the other risk factors.

1. 65 or older

2. Obese

3. Confined to a bed or chair much of the time.

4. Have had a stroke or paralyzed.

5. Have take a long trip in a car, bus, airplane or train.

Get the picture? As for Hillary Clinton, there's no word on the cause just yet, but she's flown hundreds of thousands of miles as Secretary of State, much more than her predecessors. Doctors say blood clots are much more common than you think and as you put yourself into some of the risk categories, it's wise to know the symptoms. There are many sources on the internet to find them and of course it's wise to check with your doctor. There are also ways to help prevent them.

Conclusion: Fiction