DD has been TT for a few months now and she complains of the same and wants cream on her 'gina. She says it feels better after I put the cream on so I don't think it is really that sore. I have notice that she does touch it more now with undies and also wiping with toilet paper - so both of those things might iritate her a bit.

I haven't been that worried as she only complains once a day, it doesn't stop her from going to the potty and it isn't upsetting her sleep.
I forgot that, often DD1 would also ask for cream. I think it does help sooth especially when there has been a lot of wiping.