Easy bruising sometimes indicates a serious underlying condition, such as a blood-clotting problem or a blood disease.Consult your doctor if you: 1  Have frequent, large bruises, especially if your bruises appear on your trunk, back or face, or seem to develop for no known reasons. Have frequent, large bruises, especially if your bruises appear on your trunk, back or face, or seem to develop for no known reasons. 2  Have easy bruising and a history of significant bleeding, such as during a surgical procedure. 3  Suddenly begin bruising, especially if you recently started a new medication.