Dry nose one side cocker spaniel

My dog has had a dry nose on one side for a few months he’s not in the sun to get burnt he’s in the office with water only dry on one side both outside and inside the nostril ?

Hello - a dry nose is one thing, and my phone screen is relatively small, but is there also hair missing?  I wonder about demodex, about autoimmune diseases and about demodex secondary to autoimmune diseases.   There are other possible explanations eg a soft tissue lump of some kind stopping secretions passing down the nose, but I've never seen that happen.  Ringworm might be another strong possibility.  Anyway, we would strongly reccommend seeing your vet, and meawhile be aware of the impact on people - especially immunoconpromised people and children - in case it turns out to be Ringworm.  Please will you let us know what is found?