Hi all, dd2 is 3.5 she did a wee in the potty this morning and it had a huge with cloud in it with lots of small 'crystals' in it about the size of menthol crystals. Any idea what this could be? Couldn't get sample of it as the potty wasnt sterilised so I caught her next wee which unfortunatley looked normal other than a few crystals. She seems fine in herself no fever although she did oddly complain of back ache last night before bed