###Human: I have an unilateral tonsil enlargement. Why is it so? ###Assistant: Hello. The two tonsils are unevenly enlarged. Whereas it is usually not any abnormal growth, we can say conclusively only after biopsy. I suggest you discuss with the doctor about the option of tonsillectomy and histopathological examination of the sample. Meanwhile you should get some Benzydamine gargles and check if the symptoms resolve.