Will Kidney Problem Be Related To Itching In The Hands?

I recently had percutaneous nephrolithotomy surgery to remove around 100 kidney stones from my left kidney after an infection put me in hospital,during this it was found that I have duplex kidneys on both sides and a narrowing of the ureter in the left kidney. The operation was succesful but during that time and ever since the surgery I have had itchy hands and feet during the night. There is no rash,lumps or peeling or any other signs or symptoms other than extreme itching. I am 33 and have noticed since my operation I urinate quite frequently compared to what I did before op,weight loss,tiredness and itchy hands and feet. Also the cause for the stones was put down to the narrowing of the ureter and I have to return for a scan in a few months to make sure the stones have not returned. I was wondering if these symptoms may be related to my kidney problems even though I seem to have no other issues with my kidneys at the moment.