Autoimmune disorders, in which the immune system mistakenly attacks and destroys healthy body tissue, such as platelets
If your platelets are low, talk to your health care provider about how to prevent bleeding and what to do if you are bleeding.
HIGH PLATELET COUNT
A high platelet count is 400,000 (400 × 109/L) or above.
A higher-than-normal number of platelets is called thrombocytosis. It means your body is making too many platelets. Causes may include:
After certain infections, major surgery or trauma
Bone marrow disease called myeloproliferative neoplasm (which includes polycythemia vera)
Some people with high platelet counts may be at risk for forming blood clots or even bleeding too much. Blood clots can lead to serious medical problems.
There is little risk involved with having your blood taken. Veins and arteries vary in size from one person to another, and from one side of the body to the other. Obtaining a blood sample from some people may be more difficult than from others.
Other risks associated with having blood drawn are slight, but may include:
Fainting or feeling lightheaded
Multiple punctures to locate veins
Hematoma (blood accumulating under the skin)
Infection (a slight risk any time the skin is broken)
Todd Gersten, MD, Hematology/Oncology, Florida Cancer Specialists & Research Institute, Wellington, FL. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.