There may be a physiological bilateral asymmetry in the size of the tonsils. However, such symptoms may also be due to the presence of diseases such as tonsillitis, pharyngitis or peri-tonsillar abscesses in the patient, but if the unilateral enlargement of the tonsils is too pronounced, it may also be a sign of a tumour. The patient needs to go to the hospital for a physical examination, laboratory tests and imaging to identify the cause of the disease and follow medical advice to choose medication or other methods of standardised treatment.