My gal is now going to turn 2 . I also have the same experience.
I think is because when we change the diapers, she had a release feeling that y she will tends to scratch it. I think is normal .
Well, if there is a bit of redness, maybe can apply some nappy rash cream. I am using masdela diaper cream since she was young and is very helpful.
Cos my girl alwis prone to fungus due to the hotness when she have her diapers on . HOpe she will be toilet trained soon ....