What causes elevated eosinophil levels?

Elevated eosinophil levels may be caused by the following reasons: 1. Allergic diseases: such as bronchial asthma, urticaria, food allergies, etc., which can lead to increased eosinophils. 2. Parasitic infections: such as infections caused by schistosomes, lung flukes, and filarial worms, which can also cause elevated eosinophil levels, especially during deep tissue infections. 3. Skin diseases: such as pemphigus, dermatitis herpetiformis, psoriasis, and other skin conditions, which may be accompanied by increased eosinophils. 4. Hematologic diseases: such as chronic myeloid leukemia, eosinophilic leukemia, and other blood disorders, characterized primarily by abnormally increased eosinophil counts. 5. Other diseases: including certain malignancies, infectious diseases such as scarlet fever, and rheumatic diseases, hypopituitarism, among others, which may also result in elevated eosinophil levels. Further investigation and the patient's specific circumstances are required to determine the exact cause.