I have a bad smell coming from my nose I've had it for about

Thank you for the additional information.

Since you have been diagnosed with allergies and are unable to take allergy shots, it would be appropriate to take medicines to treat allergies. The usual first line medicine is an oral antihistamine, such as loratidine or cetirizine. In someone with more severe allergies, it is common that additional medicines may be necessary, and the usual next medicine that is added is a nasal spray of steroid medicines, such as Nasacort or Flonase.

The other major issue in someone with a bad odour coming from their nose is whether there is an infection present. Allergies can lead to a secondary infection, particularly of the sinuses. The ENT physician would typically have looked for evidence of infection, and if the symptoms are unchanged since that evaluation, there would be less concern about infection. But if the symptoms are worse, either the odour or the yeasty taste, it would be appropriate to repeat the evaluation for such an infection. This evaluation would require an examination and may require cultures and an imaging study of the sinuses, usually a CT scan. You say that you have been tried on antibiotics, but a specific antibiotic regimen may be better identified with further evaluation, and you do not list any anti-fungal medicine for treatment of yeast or fungus.

If I can provide any further information, please let me know.