upset

i'm super upset.
my big girl's legs seem to have worsen.
All started off with mosquito bites. And scatch until pus.
after about 2 months, still din heal. and apply dont know how many different types of cream.
And now seems to have spread and still pus and watery.
So scared that she is going to be like that for the rest of her life.
why did the eczema happened...she dont have it last time.
hate this.
whenever i see her legs, i get very upset.
There is no way to cure it....what should I do??