Discovered two unexplained bruises, one on each leg on the opposite sides of each other. Right leg looks better, left leg looks worse. Possibilities?

Leg's are in. the line of a lot of local trauma. While easy bruising can mean either low platelets or low clotting factors, I've never seen that unless the person already had a diagnosis to support it (alcoholism, liver disease) and the bruises looked obviously abnormal (bloody).