Can dry mouth also make your nose dry and then result in excess buildup of mucus once the dryness goes away?

Thin the mucus !!: Dry mouth can be associated with dry nose and dry eyes, is called sicca syndrome and because of the decrease of fluid content, the mucus become more dense. There are several causes for this problem including medications, poor fluid intake and a rheumatic disease called Sjogren's syndrome. Check your medications, increase nasal saline and fluid intake and might need to have a few lab tests. Best