High Platelet Count
High platelet count or thrombocytosis can be a result of high production of platelets or the body's inefficiency to destroy the old platelets. Injury, medication, surgery or may be some disease can cause increase in the number of platelet production. High platelet count can cause blood clots inside the blood vessels which can block them leading to heart attacks, strokes, blood clot in the brain, etc. Platelet count above 1,000,000 per μl can be very dangerous.