Chronic eczema has more features and is not limited to three, its main features include itchiness, polymorphism, prolongation, generalization, etc. 1. itchiness: eczema is a chronic disease, can be due to external stimuli sudden onset, usually accompanied by intense itching, usually difficult to endure. 2. polymorphism: the affected skin can be manifested as infiltrated dark red spots, papules, scratches, scales, hypertrophy, roughness, mossy changes, hyperpigmentation or hypopigmentation, etc.,. 3. Prolonged: chronic eczema is prone to prolonged and repeated episodes. 4. Generalized: Chronic eczema can be generalized all over the body, preferably on the hands, feet, calves, elbow, femur, vulva, anus, etc., mostly symmetrical onset. Patients suffering from chronic eczema are advised to seek medical treatment in time to avoid delaying their condition.