Leukocytosis is a medical condition characterized by an elevated white blood cell (WBC) count in the bloodstream, typically exceeding 11,000 cells per microliter. This increase can occur in response to various factors, including infections, inflammation, stress, or more serious conditions like leukemia. The specific type of leukocytosis and its underlying cause can be determined through further diagnostic testing. Treatment focuses on addressing the underlying issue rather than the leukocytosis itself.