hi...first u need to be investigated thoroughly for kidney disease...i.e...urine, sonography
and doppler of kidneys, electrolytes, etc....then if the doctor is not able to come to a diagnosis as to why your creatinine
is high...then he might even go for your kidney biopsy
to find out the cause of high creatinine.....and yes, if you dont have swelling right now, then drink plenty of liquids to avoid dehydration
...and avoid any kind of painkillers or any over the counter medications.