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.
Injury to the skin may also break small blood vessels under the skin and cause more swelling and bruising than you would expect. Rapid swelling or bruising that begins immediately after a skin injury often means there is a large amount of bleeding or that damage to deeper tissues is present. You may need to have a skin injury checked by your doctor if a lot of swelling or bruising occurred within 30 minutes of the injury. Puncture wounds caused by the injection of a substance under high pressure into the skin need immediate medical treatment.