To determine whether tonsillitis is a viral or bacterial infection, it is necessary to go through routine blood tests, specialty tests and bacterial culture of pharyngeal secretions. 1. Bacterial infection: routine blood test will indicate that the white blood cells and neutrophils are increased, and white or yellowish pseudomembrane can be seen adhering to the surface of tonsils. At the same time, you can take the tonsils or pharyngeal surface secretions, bacterial culture and drug sensitivity test, can be roughly diagnosed as what kind of pathogenic bacteria. The more common are hemolytic streptococcus and staphylococcus aureus, combined with the doctor’s clinical experience, can be clearly diagnosed. 2. Viral infection: routine blood test suggests that monocytes and lymphocytes are obviously increased, white blood cells are normal or mildly increased, biochemical tests may suggest abnormal liver function. Observation can be seen tonsils acute congestion and enlargement, human herpes virus (EBV) infection test can also assist in judgment. Specific confirmation of the diagnosis needs to go to the hospital for examination under the guidance of a specialized doctor.