What does low creatinine mean?

I had complications after surgery and was in hospital 2 months with infections. I have been home 2 weeks and just had blood work done. My PCP is worried because my creatinine level is lower. I think I have been dehydrated some, but should I worry about something more?

We greatly appreciate your interest in helping us build our Q&A database. To discourage vandals from posting garbage, however, we require people to register before posting.