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 »

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 »

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

The Mayo Clinic explains that the best ways to treat a low platelet count include blood transfusions, surgery and changing medications. A low platelet count is identified as a condition called thrombocytopenia, and the M... 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

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 »

A high platelet count can be caused by a bone marrow condition that produces too many platelets, a separate disease, or another condition that affects platelet count, according to the National Heart, Lung, and Blood Inst... More »

www.reference.com Health Medical Ranges & Levels