What causes dry mouth and urine?

Recently, people often ask, what is the reason for dry mouth and urine? The reason for showing dry mouth and urine is diabetes, because the clinical symptoms of diabetes are polydipsia, polyphagia, polyuria, and of course there are some other diseases, such as connective tissue disease, sjogren's syndrome, and dry mouth and polyuria. If long-term performance of dry mouth, polyuria, we need to do a related examination, such as urine routine, in addition, we can do a blood sugar determination, anti-nuclear antibody examination, to understand whether there is any correlation with these diseases? And then related treatment. The above health science knowledge is for reference only.