Dry nose may occur in Sjogren's Disease. Other possible symptoms in Sjogren's are dry skin, dry mouth, dry eyes and dry ears. Arthritis can occur because of dry joints. I'm sure there are other symptoms, but the ones I've mentioned are all I can remember off the top of my head. Edit : There is a product called "Nasogel" which is available (or was) from Boots. Code: https://www.amazon.co.uk/NeilMed-GSP30-ENG-INT-30ml-NasoGel-Spray/dp/B004QDS7UM I've bought it and it does help but it was too expensive for regular use for me.