Hi,
Is there any discharge associated with this bad odour? If so, please do get an ENT check up done to look for any infection. If you do not have any discharge then you can use saline
nasal spray to keep your nose moist and prevent bad odour. But you need to get a regular check up done as
Inverted Papilloma might become malignant. Any more doubts you are welcome.
Regards
Dr. Naveen Kumar