If this is correct, then all of this makes sense to me.

Speaking to Bloomberg News, Dr. Allen Taylor, chief of cardiology at Medstar Georgetown University Hospital in Washington, D.C., said that it's not uncommon for clots to form in the legs in patients who are less mobile. According to Taylor, that might be the case for Clinton, who has been largely sedentary as she recovers from the concussion, and who spends long amounts of time sitting on long-distance air flights.

Clinton has a history of these legs clots, called deep vein thromboses. In 1998, as First Lady, doctors diagnosed a clot behind her right knee. In 2007, Clinton told the New York Daily News that the clot was "the most significant health scare I've ever had."

I had forgotten the earlier clot -- but family experience leads me to accept this one as the best explanation for what is going on. My wife also has a history of DVTs -- and we've had to be quite conscious of that issue since her recent leg fracture which has left her less mobile than usual. This isn't a medical mystery or uncommon ailment --it is something that happens to many patients every day.

This theory also explains the blood thinners -- a clot in the head would likely be treated surgically, which is why I found things a bit confusing last night when that initial report was made. So let's see an end to craziness like this from the Daily Beast. And let's remember my key point from last night.