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Common causes of a high white blood cell count include infection, drug reaction, immune system disorder and bone marrow disease, according to Mayo Clinic. Severe allergic reactions, smoking, and high levels of physical or emotional stress may also cause a high white blood cell count.


A high white blood cell count indicates an underlying problem, such as an infection or reaction to a medication. High white blood cell counts must be evaluated by a doctor, according to Froedtert & the Medical College of Wisconsin.


When a person has a good white blood cell count, it means his body produces between 4,500 and 10,000 white blood cells per microliter, according to WebMD. White blood cells are used to protect the body against harmful organisms.


Infections and inflammation usually cause high white blood cell counts, according to the American Association for Clinical Chemistry. The elevated count can be also be attributed to allergic responses, severe stress and pregnancy. Medications such as corticosteroids and epinephrine boost white blood


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. Taking certain medications, including albuterol, corticosteroids, lithium and epineph


In general, a normal white blood cell count ranges from 4,500 to 10,000 white blood cells per microliter, states MedlinePlus. Normal results may vary depending on the lab used, so it is best for patients to talk to their doctors about the results.


A person knows if his white blood cell count is normal by getting a complete blood count, according to Mayo Clinic. This test measures white blood cells, red blood cells, hemoglobin, hematocrit and blood platelets.


The causes of a low white blood cell count include autoimmune disorders, severe bacterial infections, disorders of the spleen and liver, bone marrow deficiency, and some viral illnesses, states MedlinePlus. The immune system uses white blood cells to fight off infections.


Low white blood cell counts are commonly caused by viral infections, conditions that cause depleted bone marrow, severe infections, and certain medications that eradicate white blood cells, according to Mayo Clinic. Specific medical conditions that cause low white cell counts include leukemia, aplas


Dropping some weight, drinking more water, avoiding stress and incorporating more healthy foods into the diet all combine to increase white blood count. When this count is low, the immune system cannot function properly, leaving the body poorly defended against illness or infection, according to Med