was ist wenn man zu viele weiße blutkörperchen hat — what are common causes?

An elevated white blood cell count (leukocytosis) is a common lab finding with many possible causes. The most frequent are infections (viral or bacterial), inflammation, physical or emotional stress, smoking, certain medications (e.g., corticosteroids), or a reaction to exercise. Pregnancy or splenectomy can also raise counts. Rarely, a serious condition such as leukemia or a myeloproliferative neoplasm is the cause. A single high value is usually not alarming, especially without symptoms. The key is a differential blood count (distinguishing white cell subtypes) and clinical context. A doctor should evaluate the cause before jumping to conclusions. The evidence for these statements is strong (human-strong), based on decades of clinical practice and guidelines. Note: This text does not replace medical advice.