Hello @januaryjane.
Yours sounds like quite a unique problem and I wonder if it is related to your overall inflammation that you mentioned. I wondered if you have tried buying a good form of Manuka honey and trying to heal the nostril with that? It is amazing at healing things. Also, do you do an antiinflammatory diet? Any supplements used to combat inflammation like Curcumin or Omega 3 fatty acids (FIsh oil) or ginger? I use a teaspoon of Bees and Trees Manuke Honey...the 350 strength... in my coffee every morning for immune support and because I have metastatic head and neck cancer. I will also apply it to slow healing sores, cold sores, etc. You can buy it online. Maybe addressing your overall inflammation will bring you some relief with the nostril issue.