Eczema is a common skin disease related to allergy in the clinic, and if the patient has the condition of hardening of eczema, it means that the patient’s eczema has been in the condition for a long time. Because of the intense itchiness of eczema, patients will repeatedly scratch this area, and this area may even have repeated bleeding, breakage and oozing. The hardening of eczema is due to the inflammatory stimulation of eczema itself, as well as the patient’s scratching will produce repeated stimulation of the local skin, so the local skin will be reflexively thickened. From the outside, this part of the skin will be obviously different from the surrounding skin, feel obviously rough, and even some patients will appear like moss-like changes. After the obvious thickening of the skin, this part of the skin will also appear dry skin, or even dry cracks, oozing fluid, oozing blood and so on, but the patient will still have recurring itching sensation.