What Can Cause Pus Discharge From Ear?

MY DAUGHTER IS SUFFERING FROM COUGH WITH LUNGS INFECTION NOW AND THEN WE ARE USING FORACORT MOUTH INHALER WHEN SHE GETS COUGH. SHE SNORES LOUDLEY DURING NIGHTS . ONE MONTH BACK WE OBSERVED THAT PUS IS COMING FROM HER EAR. I TOOK HER TO ENT SPECIALIST AND HE ADVISED FOR TONSILS SURGERY SAYING THAT SHE IS HAVING TONSILS. YESTERDAY HEAD X RAY WAS TAKEN FOR ADENOIDS BUT THE REPORT SHOWS THAT NO ENLARGMENT OF ADENOIDS. HER HAEMOGLIBIN LEVELS ARE 10. HER AGE ? I GOT DIABETIS DURING THE PREGNANCY OF THIS CHILD. DOCTOR IS SAYING THAT HER EAR DRUM WAS GETTING IN SIDE AND SHE MAY HAVE YEAR PROBLMES