Fever with low lymphocyte ratio is usually a bacterial infection, and the blood test shows an increased white blood cell count and percent increase. Bacterial infections can be treated with antibiotics. Commonly used antibiotics include ofloxacin, norfloxacin, cefradine, amoxicillin, azithromycin, erythromycin, etc., which can be taken orally, or injected intramuscularly or intravenously. Patients with low fever can apply cold compresses to the forehead, and those with body temperature higher than 38.5 degrees can take oral ibuprofen and paracetamol, and those with high fever can use antipyretic suppositories. Some viral infections can also cause low lymphocytes. So pay attention to the differentiation.