What is the best treatment for a child with eczema and several allergies?

See an Allergist: Allergies, especially seasonal and food allergies, are strongly associated with eczema. Until you see an allergist, best things are to keep the little cutey lotioned up with hypoallergenic emollients, vaselines, hypoallergenic cleansers, no scrubbing in the bath and patting the skin dry, keeping fingernails short (they cause extreme damage). More scratch = worse eczema.

Avoid allergens: Eczema can be treated with using the right skin products (no fragrance), moisturizing regularly and if necessary - steroid creams for a short time for flare ups. The severe itching in cczema and other allergy symptoms can be treated with an antihistamine like bendaryl, Cetirizine or loratidine. If nasal symptoms, a nasal steroid might help. If eye symptoms, allergic eye drops.