I presume that your baby has a blocked nose otherwise he would not be on the treatment you mention here. The smell you have noticed may come from mouth breathing due to having a blocked nose. It is unlikely that your baby has nasal allergy at 6 months and there may be another cause for his blocked nose.He should not be on a cortisone spray like Nasonex at such a young age.Rather use saline nose drops such as Salex twice a day.
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