When a black and blue mark shows up on your body, you usually have a painful story that goes along with it. If you start finding that bruises are appearing without your knowledge, or without being able to remember what you bumped into, start keeping a log. If it happens frequently, it could be a symptom of a deeper problem.
Easy bruising happens when your blood is having a hard time clotting. This occurs when you have a low platelet count. This symptom will only correct once your platelet count goes back up. In the meantime, always wear shoes to avoid hurting your feet and you might want to rearrange some furniture to make it easier to navigate your home without bumping into things. Easy bruising is not life threatening.