How is eczema caused and why is it prone to recurrence? Eczema is a common skin disease with a very complex etiology, caused by the interaction of various internal and external factors and a delayed metaplasia. There are many factors that cause eczema, and the cause-effect relationship is complex, which often leads to recurrent and chronic eczema. Can eczema be eradicated? The key to preventing recurrence is to try to find the triggering cause. In addition, allergic qualities are not set in stone and can change with age and external environment. In some cases, eczema can be stopped by changing the reactivity of the body through strengthening exercise and changing the environment. How to find the cause? The causes of eczema are complex, but some can be found by asking about medical history, such as occupation, lifestyle, medication history, previous illnesses, etc. If necessary, allergen tests can be helpful. However, there are still some patients who cannot find the cause and can only be treated symptomatically for control and relief. What kinds of eczema are there? Eczema often presents as a polymorphic rash with erythema, swelling, papules, papules, blisters, oozing, vesicles, crusting, scaling and mossy changes. According to the pathogenesis, it can be divided into acute, subacute and chronic. How to treat eczema? (1) General treatment Remove possible causative factors; avoid all kinds of external stimuli; avoid allergenic spicy and fishy foods; keep the skin clean to avoid secondary infections; remove ideological concerns, build confidence and actively cooperate with treatment. (2) internal therapy antihistamines can be used; serious oral compound glycyrrhizin and tretinoin; corticosteroids for severe generalized eczema or certain stubborn eczema can be used for a short period of time, but it is best not to use long-term. (3) Topical therapy You should go to the hospital, under the guidance of the doctor, for the nature of the skin lesions correctly use topical drugs.