Dry eczema on hands and feet with severe itching, darkened (black) thick skin usually suggests chronic eczema with lichenification from long-term scratching. Treatment typically involves restoring the skin barrier and reducing inflammation. Doctors commonly recommend regular use of thick moisturizers and emollients along with topical steroid creams such as Mometasone for short-term control of itching and redness, or non-steroid options like Tacrolimus for sensitive areas or long-term management. Keep the skin well-moisturized, avoid hot water, harsh soaps, and scratching, and wear cotton gloves/socks if needed. Since the skin is becoming thick and dark, you should consult a dermatologist for proper diagnosis and to rule out fungal infection or other skin conditions before prolonged steroid use.