Eczema due to dogs?

My mom has two dogs. Every time my son goes on the living room, his cheeks break out. He has eczema. But only certain things trigger it. 
My room has zero dog hair. So he never breaks out in my room. My mom won't get rid of her dogs just because of his break outs. 
Anything we can do to help? I have creams for him and steroid creams already.