W.B.
Hi K.,
A little girl I watch had this same issue. 6 months ago we tried potty training and she would go pee just fine but when it came time to going #2 in the potty she wouldn't and she would hold it to wear she would get severely constipated.
So now 6 months later she has had an infection and needed antibiotics and it caused her to have diareha. She has very sensitive skin so her mother put desitin on her, her daughter told her that she didn't want it on there because it burned. Her mother told her the only way she would not put it on there was if she started pooping in the potty. So on Monday of last week it was the 1st time she went poop in the potty. We had a few accidents with peeing in our panties (which is to be expected) but now as of Friday we didn't have any accidents and as of today and talking to her mother, she has been accident free for the whole weekend.
My advice give it some time, let her go at her own pace. I am here to tell you it will all come together when the time is right. Don't put any pressure on her and if she wants to pee on the potty encourage it and if she doesn't be fine with it.
** edit, the rash that my DG had was caused by the diarhea as she was not yet peeing in the potty. She has very sensitive skin and you can'y leave poop on her skin for longer then 5 minutes without her getting a nasty diaper rash, we have dealt with this since she was a newborn.
Like I have said before every child is different and they do it in their own time.
My own 4 yr old didn't have a problem doing any of it, she got up there and went and was potty trained in a week.