What do the results mean?There are many reasons your blood differential test results may be outside the normal range. A high white blood cell count may indicate an infection, immune disorder, or allergic reaction. A low count may be caused by bone marrow problems, medication reactions, or cancer. But abnormal results don't always indicate a condition needing medical treatment. Factors such as exercise, diet, alcohol level, medicines, and even a woman's menstrual cycle can affect the results. If the results seem abnormal, more specific tests may be ordered to help figure out the cause. To learn what your results mean, talk to your healthcare provider.Learn more about laboratory tests, reference ranges, and understanding results.
