It's hard to guess but I've had so many symptoms that may be from dryness that in defence because my stentorian sneezing was causing bloody fluid results. Finally I started lightly twirling a QTip in the petroleum jelly and lightly rubbing it in my nostrils. It seemed to help as long as I don't forget to do it. It also stopped the mad itching. I have nonallergenic rhinitis and its been a problem for years. I used to have various sores as you've described. It seems to relieve all.