Hello.  My name is Ken.  My blood sodium has been low (130) for about a month.  My internist has asked me to see a nephrologist.  I havent spoken to him about this (just spoke with a tech on the phone), and I am very curious about why I would see a nephrologist.  Are there renal diseases associated with low sodium?  Do they only treat the problem symptomatically , or do they look for an underlying cause?  What might the causes be?  My appointment is not for a couple of weeks, and I am not good at waiting to be educated when it comes to my health!  Can you help?  Thanks.
Hello and welcome to Chat Doctor, The levels of sodium and other electrolytes are maintained by kidneys. So, kidney abnormalities will lead to alteration in the levels of sodium, potassium and chloride. This is the reason that your doctor has referred you to a nephrologist. Thus, you will need to consult your nephrologist for clinical assessment and relevant investigations and thus treatment. I am afraid you will have to wait for clinical assessment and investigation before exact diagnosis can be made. Thanks and take care Chat Doctor. 