According to the National Heart Lung and Blood Institute, a high platelet count can indicate a number of different conditions, including cancer, anemia or a reaction to medications. The National Heart Lung and Blood Inst... More »

A platelet count of more than 450,000 microliters is considered high, according to Mayo Clinic. A normal platelet count reading falls between 150,000 and 450,000 microliters. 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 »

Causes of a high platelet count include recent spleen removal, cancer, chronic myelogenous leukemia and the use of certain medications, according to MedlinePlus. An increased platelet count indicates the body is making m... More »

www.reference.com Health Medical Ranges & Levels

Causes of a high platelet count include cancer, recent spleen removal and anemia caused by premature destruction of the red blood cells, notes MedlinePlus. A normal platelet count ranges from 150,000 to 400,000 platelets... More »

A high white blood cell count may indicate anemia, infection, allergic reaction or leukemia, states MedlinePlus. Other causes include extensive tissue damage, cigarette smoking and severe mental or physical stress. Takin... More »

www.reference.com Health Medical Ranges & Levels

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 »