I am really surprised you have never put diaper cream on your baby's labia before. Yes, it's perfectly safe and certainly preferable to diaper rash (which can turn into open sores, get infected, etc).
Big sister {September 2008} Sweet boy {April 2011} Fuzzy Bundle {ETA July 2014}
Re: is it ok if diaper rash ointment gets into my baby's vagina?