<s>[INST] Hi and thank you. I had my gallbladder out on Monday morning. Stayed in hospital all night and started experiencing some strange feelings in my mouth. They had given me an antibiotic prior to the removal. This morning, Wednesda, I discovered many canker sores in mouth. Surgeon says it is nothing to do with what he did although a breathing tube was used during surgery. I m thinking it might have been the antibiotic. GP is calling me back in AM but tonight I am finding it difficult to eat. Any suggestions? Karen , Schenectady, NY [/INST] Hi, Welcome to Health care magic forum.                        It appears to be the allergic reaction to the anaesthetics, antibiotics, or some other drugs, or may be due to the ill fitting of the intubation tube into the trachea for induction of the anaesthesia.                        I advise you to consult an E.N.T. surgeon for diagnosis and treatment.                        I usually prescribe to my patient with such symptoms, anaerobic antibiotic, lactic acid bacilli, along with the other drugs of the post operative treatment.                        Wishing for a quick and complete recovery. Thank you. </s>