Low white blood cells can have the following consequences: infections can easily occur when white blood cells are low, with non-specific symptoms such as fatigue, dizziness, and loss of appetite. Common sites of infection are respiratory tract infections, gastrointestinal tract infections, as well as urinary tract infections and genital tract infections, which can result in high fever, necrotizing mucosal ulcers, and even severe sepsis, septicemia, and infectious shock. Leukocytes mainly play a bactericidal and antiviral role in the body, and when they are low, they are mainly prone to the above serious infections, such as tonsillitis, bronchitis, bronchopneumonia; genitourinary infections such as urethritis, pyelonephritis, sepsis, and other different conditions.