<s>[INST] My three year old daughter seems well but has fishy smelling breath! What could this be please? It has been like this for about a month now. I clean her teeth at least twice a day including scrubbing her tongue, but the smell comes back within about ten mins of cleaning them. [/INST] Hello he read your query. Bad smell from mouth or halitosis is mostly due to certain substance produced by bacteria present in plaque. It is very imp to maintain a good oral hygiene. As u said u brush her teeth twice days God BT is your method of brushing proper. Use of mouthwash is also suggested thrice daily. Visit a dentist to find out the condition of the teeth and gums.is dear any presence of plaque. Hope this ans helpsRegards </s>