It's my dd (aged 9).
Poor thing is saying it's stinging and hurting when she walks. The gp gave a steroid cream and then a type of emollient after the dry skin has all come off but it's not really helped much and it's now started on her other heel too 
The gp thinks it might be psoriasis but wasn't sure.
Any advice would be hugely appreciated, im really starting to worry now.