How to identify allergic eczema pictures Atopic eczema is a common skin disease that is easily misdiagnosed and missed, so correct identification and effective treatment are very important. To identify allergic eczema, you need to observe the following aspects: 1. The condition of the skin surface. Patients with allergic eczema will have inflammation, redness, itching, rash and other conditions on the skin surface, showing different shapes, colors and sizes. Usually, allergic eczema rashes appear in different shapes such as flat, red, papules, bubbles or scabs.