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Definition
By Mayo Clinic staffThrombocytopenia is the medical term for a low blood platelet count. Platelets (thrombocytes) are colorless blood cells that play an important role in blood clotting. They stop blood loss by clumping together and forming plugs in blood vessel holes.
If for any reason your blood platelet count falls below normal, this is called thrombocytopenia. It often occurs as a result of a separate disorder, such as leukemia or an immune system malfunction, or as a medication side effect. Complications may range from none to severe bleeding.
Thrombocytopenia usually improves by treating the underlying cause. Sometimes, medications or surgery can help treat chronic thrombocytopenia. If bleeding is severe, you may need a blood or even a platelet transfusion.
