Eczema also known as atopic dermatitis. Eczema is a condition wherein patches of skin become inflamed, itchy, cracked, and rough. Some types can also cause blisters. Certain substances or conditions called trigger factors can cause eczema to flare-up: Irritants such as soaps and detergents, wool, skin infections, dry skin, low humidity, heat, sweating or emotional stress. Allergens such as dust mites, pollen, moulds, or foods.