Eczema is a condition wherein patches of skin become inflamed, itchy, cracked, and rough. Some types can also cause blister.
Many people use the word eczema when referring to atopic dermatitis, which is the most common type. The term atopic refers to a collection of conditions that involve the immune system, including atopic dermatitis, asthma and hay fever. The word dermatitis refers to inflammationof the skin.