Effects of a high blood platelet count, or thrombocytosis, can include stroke, heart attack and blood clots due to blood vessel blockage, according to the Cleveland Clinic. After thrombocytosis has been in an individual'... More »

Symptoms of a high platelet count include headache, bleeding, feeling weak, and numbness in the hands or feet, states Healthgrades. Blood-clotting symptoms, including nausea, seizures, dizziness, difficulty breathing and... More »

Generally, a count that is over 500,000 platelets per microliter of blood is considered high enough to seek the underlying cause, notes Mayo Clinic. A normal platelet range is 150,000 to 450,000 platelets. A high platele... More »

An elevated platelet count generally means one of two things: reactive thrombocytosis or essential thrombocythemia. Reactive thrombocytosis means that an underlying condition has elevated the platelets, while essential t... More »

www.reference.com Health Medical Ranges & Levels

Doctors treat an elevated platelet count, called thrombocytosis, by targeting its root cause. Thrombocytosis can result from a blood or bone marrow disease, which can overproduce and elevate the amount of platelets in th... More »

High blood pressure is considered dangerous when it leads to stroke, kidney disease, heart failure and heart attack, and dangerously high readings are 180/110 and higher. A person may have high blood pressure for a long ... More »

An increased platelet count, or thrombocythemia, can cause blood clots that travel to the brain, feet and hands, according to Healthline. The symptoms include numbness in the fingers and toes, dizziness, headache, heart ... More »

www.reference.com Health Medical Ranges & Levels