What does it mean if my platelet level is high?

Usually Not Serious: Platelets are made in your bone marrow. A platelet is a blood component and helps your blood to clot. If your platelet count is over 500 000, it is felt to be high. In most cases it is due to a recent infection, blood loss, or surgery and is temporary. Women who have had their spleen taken out will often have high platelets. Only in rare cases is it due to a bone marrow tumor.

Thrombocytosis: High platelet count is indicative of either a primary bone marrow myeloproliferative disorder or a secondary cause like iron deficiency, stress. Primary disorders include et essential thrombocytosis are driven by jak2 mutation or CML driven by bcrabl mutation. High platelets cause risk of vascular thrombosis, tia, cva, mi. Underlying cause have to be diagnosed and treated to normalize counts.