Banana causing Nappy Rash?

[Emprexia]

Trying to wean 7mo DD, we've been working on it for the last month and i found she really loves Banana.

Before anyone yells, i have some autism food issues and find it easier to use jars.. so no judgy on that please

Basically.. i use the Hipp Organic or the Cow & Gate stuff.

The Banana yoghurt Breakfast that Hipp do, doesnt affect her.. but the Banana Custard causes god awful nappy rash, as does the C&G Fruity Yoghurt.

How come the one food is fine, but the other two arent?

Anyone else had a similar problem with Banana?

have you checked what other ingredients they have as the banana might be a red herring?

I thought it was acidic things that didn't really help with nappy rash. I think a lot of the savoury jars have tomato in, whatever the 'meal' is supposed to be.