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White blood cells (leukocytes) help protect your body from infection. Normally, when germs get inside your body, your body makes more white blood cells that search for and destroy the germs. Less often, there are medical problems where the body may make a lot more white blood cells than it needs.
Your white blood cell count may be high because your body is fighting an infection. But other things can cause it, such as some medicines, burns, an illness, or other health problems. When your doctor sees that your white blood cell count is high, he or she will try to find out why, and then treat the cause.
A high white blood cell count alone doesn't cause any symptoms. The symptoms you feel may come from the medical problem that your white blood cells are fighting. For example, if you have pneumonia, you may have a fever and trouble breathing. These are symptoms of pneumonia, not of a high white blood cell count.
Follow-up care is a key part of your treatment and safety. Be sure to make and go to all appointments, and call your doctor or nurse advice line (811 in most provinces and territories) if you are having problems. It's also a good idea to know your test results and keep a list of the medicines you take.
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Current as of: September 8, 2022
Author: Healthwise Staff
Medical Review:Adam Husney MD - Family Medicine & Martin J. Gabica MD - Family Medicine
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