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A normal white blood cell count is generally about 4,500 to 11,000/μL. White blood cell counts that are too high or too low may be dangerous, depending on the cause. A high white blood cell count is called leukocytosis, which is generally diagnosed when white blood cell levels exceed 11,000/μL.
In general, a normal white blood cell count is typically between 4,500 and 11,000 white blood cells per microliter of blood. However, an abnormally high white blood cell count, known as leukocytosis, can indicate an underlying health issue.
A high white blood cell count can be caused by an infection, cancer (rarely), and many other causes. Learn the symptoms and when to see a healthcare provider.
A high white blood cell count usually means one of the following has increased the making of white blood cells: An infection. Reaction to a medicine. A bone marrow disease; An immune system issue. Sudden stress such as hard exercise. Smoking. Specific causes of a high white blood cell count include:
Leukocytosis means you have a high white blood cell count. This means you have more white blood cells than normal. Leukocytosis is a normal immune response and isn’t always a cause for concern. Most of the time, it means that your body is fighting off infection or inflammation.
A normal white blood cell count can mean your immune system is functioning as it should. The normal white blood cell count range is typically between 4,000 and 11,000/microliter (μL).
What qualifies as a normal white blood count isn't the same for everyone. A normal count for adults is from 4,500 to 11,000 per microliter. Newborns have a much higher number — as high as...