Assuming these are in ×10⁹/L (or K/µL):

This is common and often temporary, such as with a recent or current infection, inflammation, physical stress, smoking, or medicines like corticosteroids. A high total WBC driven by neutrophils is a common pattern in infection or stress responses, as described by MedlinePlus and Cleveland Clinic.

By themselves, these numbers are not usually an emergency, especially if you feel well and the rest of the CBC is normal. Your clinician may simply repeat the CBC after you recover from any illness.

Seek prompt medical care if you have high fever, severe illness, shortness of breath, chest pain, confusion, or rapidly worsening symptoms. Arrange a routine review if the values stay elevated on repeat tests, are increasing, or you have unexplained weight loss, night sweats, enlarged lymph nodes, or easy bruising.