Tonsillectomy is advised if there is recurrent streptococcal tonsillitis, recurrent peritonsillar abscess
and chronic tonsillitis. Recurrent tonsillitis is an indication for tonsillectomy, as the tonsils may harbor the infection which keeps flaring up, or they may develop new infections. Also, sometimes persistent enlargement of the tonsil can sometimes be due to a lymphoma. So, if it is not responding to max, medical treatment, then tonsillectomy is the option.