When you have thrombocytopenia, broken blood vessels under the skin occur more frequently than usual, forming hematomas (he-mah-toe-mahs), commonly called "black and blue marks." Thrombocytopenia also can result in unusual bleeding (for example, nose bleeds, continuous bleeding from small cuts, bleeding gums, blood in the stool or urine, or heavier-than-normal bleeding during menstruation).

If your CBC shows that your platelet count is low, your doctor may order a platelet transfusion to ensure that your body can form clots in the event of a serious cut or bruise.

You can take the following steps to minimize your chance of bruising and bleeding:

• Use a soft toothbrush, don't floss, and use lip balm.
• Blow your nose gently.
• Don't use tampons during menstruation.
• Use an electric razor for shaving.
• Be very careful around sharp objects such as scissors and knives.