I am now thinking that this could be scabies. But no one else in the family has it. Any idea?

Hello, My son has been dealing with eczema since he was six months old. He is now almost 8. His itchy skin was diagnosed as eczema and he was prescribed hydro-cortisone cream and Atarax as needed. He normally had eczema on the front side of his upper legs. But recently his eczema expanded beyond our...