Neutrophil count (absolute)

What Neutrophils Do in Your Body

Neutrophils are a critical part of your immune system. They rush to sites of infection or injury to destroy bacteria and other harmful invaders. When your body detects an infection, neutrophils increase in number to help clear the threat. This process is part of your body’s natural response to inflammation and healing.

Why Your Doctor Might Order This Test

Your doctor may request an absolute neutrophil count to check for infections, blood disorders (like leukemia), or immune system issues. It’s also useful before certain treatments (e.g., chemotherapy) to monitor your immune status. Low counts can mean you’re more vulnerable to infections, while very high counts might indicate an overactive immune response or other conditions.

What Normal Results Mean

While specific reference ranges vary by lab, a normal ANC typically falls within a healthy range for your body’s immune function. If your results are outside this range, your doctor will discuss possible causes and next steps.

Common Causes of Low or High Neutrophil Counts

Low neutrophil counts (neutropenia) can result from infections, certain medications, autoimmune diseases, or blood disorders. High neutrophil counts (neutrophilia) may signal infections, inflammation, or conditions like stress or certain cancers. Your doctor will evaluate these findings in the context of your overall health.