Start with making sure the enclosure is 90-95degrees. I'm not sure about Balls, but I was told by the Vet to keep the humidity low for a couple of days. My Tiger Retic just had this problem because we kept her in a bathroom until her new enclosure was built. Apparently, the linoleum and porcelain zap the heat from animals, which is particularly bad for a snake. Now we know.

Check around the nostrils and see if she has black or discolored patches around the nostrils and see if she is mouth breathing. She'll be holding her mouth open to breath because she can't breath from her nostrils, which means she can't eat.

The Vet is the best thing to do, but, some of us can't always afford it when needed. If you can't, raise her temp immediately. Go to a local pet store and buy vitamins for her water to help her fight the infection and lack of nourishment. We were told to keep the water dish small so she didn't spill it or lay in it, but had just enough to drink.

We weren't able to see the vet for 3 days, and when we got there, our python was already better.

Also, if you bought it from someone who didn't know what they were doing, check it for scale rot and mites too. I've rescued a lot who have these problems. If she has multiple problems to fight, it makes getting well harder.

Good Luck.