Skin inflammation, or dermatitis, refers to a range of conditions that cause redness, swelling, and itchiness of the skin. Synonyms for skin inflammation include eczema, psoriasis, hives, rash, and atopic dermatitis. Eczema is a chronic condition where patches of skin become itchy, inflamed, and irritated. Psoriasis is a chronic autoimmune disorder that causes scaly, red patches on the skin. Hives, or urticaria, are raised, itchy, red bumps that appear suddenly. A rash is a generalized term for any change in the skin's color or texture. Atopic dermatitis is a chronic inflammatory skin condition that often begins in childhood and can cause red, itchy rashes on the skin.