The whitening of the tonsils may be a clinical manifestation of mononucleosis pharyngitis, acute crypt tonsillitis, pharyngeal diphtheria and other diseases. 1. Mononucleosis pharyngitis: this disease is acute and common in children. The tonsils are red and swollen, with ulceration and grayish-white exudate attached, which can be easily wiped away. The lesions rarely go beyond the tonsils. 2. Acute cryptogenic tonsillitis: B hemolytic streptococcus, staphylococcus, influenza bacillus and adenovirus infections can cause this disease. The tonsils are congested and swollen, and there are bean dregs in the crypts composed of shed epithelial cells, fibrin, leukocytes and bacteria, etc., which can be gradually increased and overflowed from the crypt openings, and sometimes connected with each other in the shape of pseudomembrane, which can be easily wiped away. 3. Pharyngeal diphtheria: acute infectious disease caused by virulent diphtheria bacillus, grayish-white pseudomembrane on and around the tonsils, often extending beyond the tonsil area, not easy to swab, swabbing is easy to hemorrhage, often one side of the heavier, one side is lighter. The appearance of tonsils white need to actively seek medical treatment, systematic examination, clear diagnosis.