What can i do to address thrombocytosis?

It can be.: Thrombocythemia (another name for an abnormally high platelet count) can predispose you to both venous and arterial blood clots. The cause of the thrombocythemia and the level to which they are elevated are both important factors to consider in treatment. Consult with a hematologist. The treatment may involve taking Aspirin or another platelet lowering drug. Ultimately, the cause it what matters.