Colbert ended his show late last year for a move to David Lettermanâs job at CBS. Other correspondents whose roles on the show shot them to stardom include actor Steve Carell and comedian John Oliver, who just started the second season of his HBO show Last Week Tonight.
3. Blood Disorders. Blood disorders such as hemophilia and leukemia can cause unexplained bruising, often because your blood fails to clot properly. If you have severe and frequent unexplained bruising, it's a good idea to see a physician to rule out such disorders, especially if it seemed to come on suddenly.
Sudden unexplained bruising or blood spots under the skin or a sudden increase in the frequency of bruising may be caused by: 1  A medicine, such as aspirin or blood thinners (anticoagulants). 2  Infection that causes the buildup of toxin in the blood or tissues (sepsis).ruises develop when small blood vessels under the skin tear or rupture, most often from a bump or fall. Blood leaks into tissues under the skin and causes the black-and-blue color.