Tonsils that are large on one side and small on the other are a relatively common condition, and the tonsils on both sides are not symmetrical and perfectly equal in size. The specific reasons for this are as follows: 1. Congenital: Patients have congenital large tonsils on one side. 2. Acquired: Some patients may be affected by chronic inflammatory factors in the tonsils, and the tonsils may gradually grow and swell due to recurrent inflammation or the persistence of chronic inflammation, but the growth and swelling of the tonsils on both sides may not be identical, which may cause the condition of large and small on one side. However, the enlargement and enlargement of the tonsils on both sides may not be identical, which may result in a situation where one side is large and the other is small. If the patient does not have any special symptoms or feelings, he or she can be followed up regularly. If a patient has rapid enlargement of the tonsils on one side within a short period of time, or if various kinds of growths appear on the surface of the tonsils, or if ulcerative lesions persist, further detailed examination is needed to investigate whether there is a malignant tumor of the tonsils.