I havent been diagnosed with anything as of yet, however I have been told to repeat my blood tests and urine tests and I have an appointment with my doctor. I am 18 years old and my BUN TEST WAS 22. Which was high (7-20mg/dl). My creatinine was normal , however my BUN to Creatinine Ratio was 28 which was high. Also my potassium on a scale of 3.8-5.1 was 5.5, high. My urine results showed Leukocyte Esterase +1, WBC 10-20, Squamous Epitheral cells 6-10 which may be a UTI i have no clue. But I do know I have been feeling tired and i have been having joint pain. Is this a sign my kidneys are not working right?? I also go to the bathroom hardly....