I. What is eczema? The general clinical definition of eczema is: a common inflammatory skin disease of the epidermis and superficial dermis caused by a variety of internal and external factors, with clinical manifestations of symmetry, exudation, pruritus, polymorphism and recurrence. According to the rash performance, eczema can be divided into acute, chronic and subacute eczema (please note that it is not based on the length of onset, but the performance of the rash, so do not easily diagnose yourself as chronic or acute eczema). At the same time, there is a growing clinical consensus that eczema is a type of inflammatory skin disease (synonymous with “dermatitis”) with a diverse rash, symmetrical distribution and recurrent episodes of intense itching. However, eczema is generally of unclear etiology and is caused by a variety of internal and external factors, either alone or in combination, whereas dermatitis generally has a clear etiology, such as “contact dermatitis,” “neurodermatitis,” “solar dermatitis,” and so on. Therefore, eczema is often referred to a group of diseases, rather than a disease. How is eczema treated? There are many medications available to treat eczema. The choice of topical drugs is even broader, with at least a few dozen kinds in the clinic, from solutions to creams, from corticosteroids to immunosuppressants, and a wide variety, requiring professional selection by a doctor, not to be applied topically with random drugs. There are also many drugs for systemic treatment, including antihistamines, glycyrrhetinic acid extracts, immunomodulators, and some proprietary Chinese medicines with definite efficacy. Whether topical or systemic application, each drug has its own characteristics and needs to be accurately grasped. Generally speaking, topical medication is the main treatment, and systemic treatment is supplementary. Treatment generally requires choosing a treatment plan based on the type of rash and looking for possible causes based on the characteristics of the flare-ups. Treatment is often different during flare-ups and remission periods. Therefore, it is important not to say lightly what medication is good for eczema? How to treat it? Be sure to ask a professional dermatologist after the medical history and look at the rash to determine the treatment plan. Why is eczema prone to recurrence? How to avoid recurrence? As mentioned earlier, eczema is more likely to recur because its cause is unknown and is caused by a variety of internal and external factors acting alone or together. At the same time, because patients are sometimes eager to seek medical treatment, resulting in eczema treatment will have a tendency to over-treatment, such as hormonal drugs in large doses for a long time irregular use, although the temporary rapid control of itching and rash, but once you stop using hormonal drugs, the rash will quickly flare up, which is also a medical factor that eczema is prone to recurrence. Since eczema is generally considered to be a class of allergic diseases, with a certain relationship to the patient’s immune status, immunomodulators are also widely used and have also achieved some clinical efficacy, and can be used selectively according to the patient’s systemic condition. At the same time, efforts should be made to find possible causes and to actively cooperate with the physician in remission treatment without arbitrary interruption.