What could be causing a salty taste in my mouth? I don't usr salt and try to stay aeay from salty foods and have edema and dark smelly urine. Plenty wat

Oral hygiene. You may wish to consult a dentist to have your oral health checked. I do not know of a systemic illness that may explain salty taste in the mouth.
Need to see doctors. See your physician and then dentist, you definitely have something causing those symptoms... Dehydration, blood pressure, gum disease, infection.