maintain a good hygiene for your child and also ensure that she is drinking a lot of water give her fluids like coconut water aur lemon water for normal buttermilk which will ensure that her water lev

Give her fluids... Coconut water works wonders for UTI... You can also soak saunf and mishri, squeeze out the juice and if needed dilute it and give it her with a little honey... Nimbu paani also acts a good drink, any citrusy drink like orange juice or kiwi juice as Vit C can help her fight the bacteria.... Hope this helps...

Please consult a doctor immediately

How old is she ?

Fetch her plenty of water. If she doesn't take water increase the liquid intake(soup, juice, electoral ,coconut water,etc). This will remove infection via passing urine.