with pseudomonas if not managed properly can progress to malignant otitis externa
, a serious condition causes soft tissue, bony damages and may cause hearing loss.
For pseudomonas infection ciprofloxacin
(oral), ceftazidime and amikacin (intravenous) can be used.
Ciprofloxacin is generally avoided in children below 7 years as studies in animal had shown that it can cause cartilage damage. As there is not any such study in human beings, many physician use this in children.
Still amikacin and ceftazidime can be used. Local application of antibiotic will not help much. Proper cleaning of ear canal is also very important as it increases antibiotic efficacy.So I would suggest you to consult a pediatrician
also, so that it will be easy to select antibiotic of choice.