People with high platelet levels often don't have signs or symptoms. When symptoms occur, they're often related to blood clots. Examples include:  Headache. Confusion or changes in speech. Chest pain. Shortness of breath and nausea. Weakness. Burning pain in the hands or feet.  Less commonly, very high platelet levels may cause bleeding. This can cause:  Nosebleeds. Bruising. Bleeding from your mouth or gums. Bloody stool. 
people high platelet levels don't signs symptoms  symptoms occur  they're blood clots  examples include:  headache  confusion changes speech  chest pain  shortness breath nausea  weakness  burning pain hands feet   commonly  high platelet levels may cause bleeding  can cause:  nosebleeds  bruising  bleeding mouth gums  bloody stool
thrombocytosis