I get yellow hands. I have something called Gilbert's syndrome which it's basically harmless - my body doesn't excrete bilirubin as efficiently as most people. About 5% of the population have it and most don't know because it doesn't really cause any problems for them. I only know because I had a Dr who had it himself so he picked up that I have it.
Anyways... yellowness is usually something to do with the liver so it's worth mentioning to your carer - probably quite soon because liver problems need to be checked.