Teething rash? Pics

[BibbidiBobbidi]

Sorry if this isn't in the right place, I didn't know where to put it!

DD is 6 months old and has had a rash on her race for the past two days and has also had a sore bottom.
I've thought she's been teething for a while and just want to confirm this is a teething rash and not anything else really. It doesn't seem to be bothering her, it feels a little bit dry and I've been putting a bit of E45 on it.

Thanks in advance!