An increased white blood cell (WBC) count, or leukocytosis, can result from infections, inflammation, stress, or immune responses. Bacterial infections, like those treated with ceftriaxone injection supplier, often trigger elevated WBCs as the body fights pathogens. Other causes include viral infections, allergies, autoimmune disorders, or tissue damage from trauma or burns. Chronic conditions like leukemia or lymphoma may also elevate WBC counts. Lifestyle factors, such as smoking or intense exercise, and medications like corticosteroids can contribute. Rarely, pregnancy or allergic reactions cause temporary spikes. Always consult a healthcare provider for accurate diagnosis and treatment.