Inflammation and fever of baby’s tonsils are mostly caused by bacterial infections, but can also be caused by a mixture of bacterial and viral infections. Streptococcus b hemolyticus is the main causative agent of the disease. Non-hemolytic streptococcus, staphylococcus, streptococcus pneumoniae, influenza bacteria and adenovirus can also cause this disease. Mixed bacterial and viral infections are also common. In recent years, cases of anaerobic infection have also been found. The above pathogens exist in normal people’s oral cavity and tonsils and will not cause disease, when certain factors make the whole body or local resistance is reduced, the pathogen can invade the body, or the original bacterial reproduction and cause disease. And cold, damp, fatigue, excessive alcohol and tobacco, harmful gases can be the cause. It is recommended to go to the hospital in time when you find your baby’s tonsils inflamed and feverish, under the guidance of the doctor for reasonable treatment.