Ive had a dull/painful ache in r kidney on waking lately- itgoes when getup. eating way to much salty foods+ verry bloated. what could cause the pain?

MAny: Many possibilities. If no other complains could be muscular .drink 1/2 body weight in water per day and can see if helps.

Flank pain: How do you know it is Kidney pain ? What you are describing is pain in the area where the kidney is located , that seems to go away when you get up . That sounds more like muscle pain . Because you are having a lot of other symptoms and your diet is high in salt , your K could be low . You should see your doctor for some testing .