What can an eczema patient get tested for besides food and normal things. My thick eczema on feet with cuts and cuts on fingers and arms and legs.

Probably no allergie. Most patients with excema are not specifically allergic to something. This is a problem that can be inherited and while it is treatable is not curable. It is usually treated with topical cortisone creams, moisturizers, mild soaps and sometimes bleach baths or oral antibiotics. You need to see a dermatologist for proper treatment.