Corticosteroid-dependent dermatitis (corticosteroid-dependent dermatitis) is a non-purulent inflammation of the affected skin due to the long-term topical application of corticosteroid (corticosteroid) preparations, which causes dependence on the drug. This kind of dependence has the following characteristics: after using hormones, the original disease improves rapidly, but cannot be cured, and once the treatment lasts for several weeks or months, once the drug is stopped, within a few days, erythema, papules, tenderness, fissures, pustules, desquamation, pain, itching, burning, tightness, and the original disease worsens; when the hormones are used again topically, the above symptoms quickly subside, and if the drug is stopped again, rebound dermatitis occurs rapidly and is heavier than before. If the hormone is discontinued, rebound dermatitis occurs rapidly and is more severe than before. In order to avoid the recurrence of rebound dermatitis after discontinuation of the drug, patients rely entirely on topical hormones. Some of the original topical preparations are not effective and must be replaced with stronger hormone topical preparations, or increase the dosage, or shorten the interval between medications, in order to improve symptoms. The cause of the disease is due to the side effects caused by the external use of hormones, so the cause is the abuse of hormones, the causes of hormone abuse are the following aspects. 1, the lack of understanding of hormone topical preparations, especially the lack of sufficient understanding of the side effects of hormone topical use, some non-professional dermatologists lack of pharmacological knowledge and abuse. Corticosteroids have an anti-allergic effect of inhibiting immune response, can quickly eliminate the inflammatory response of dermatological diseases, topical application can reduce congestion and edema, so that the degree of itching can temporarily relieve and subside, and quickly improve the clinical symptoms and signs, many patients a skin damage, regardless of its cause, regardless of whether it is a contraindication to hormones, are self-diagnosed with hormone topical preparations. The stronger the hormone, the greater the amount, the faster the onset and the heavier the condition. The strongest hormone topical preparations are most likely to cause skin atrophy and other side effects, such as facial pityriasis simplex, many people use skin easy to apply topically to replace cosmetics, applied to the face for several years, serious dependence dermatitis 3, the wrong choice of indications hormonal dermatitis more than 90% of patients for non-corticosteroid indications, and some are even contraindications to topical hormones. Such as acne, rosacea, pityriasis simplex, superficial fungal disease, chloasma, etc. are not suitable for the application of hormone topical preparations. 4.Improper choice of medication site The absorption rate of hormone differs in different parts of human body skin. The facial appendages are richer, with more hormone target cells, thin keratin layer, tender skin and rich blood flow, which are more easily absorbed by topical hormone, and thus side effects are more likely to occur; inguinal, axillary and inframammary folds are more sweaty and humid, and topical hormone preparations are easily absorbed, which are most likely to occur in skin linear atrophy. 5, the use of too long short-term application of hormone topical preparations, can cause epidermal atrophy, and can inhibit the synthesis of dermal collagen; long-term topical use, inhibit the local immune response function, is very likely to lead to or induce bacterial and fungal infection and expansion. In addition, the long-term external application of large areas, the absorption of the drug increases, which can cause systemic side effects. Clinical manifestations Patients have varying degrees of facial skin atrophy, thinning, shiny, diffuse flushing or skin erythema, or capillary dilation, local swelling, dry cracking and flaking, or acne-like rash or rosacea-like dermatitis or skin atrophy lines or folliculitis pustules. Local itching, burning pain, tightness and swelling, or dryness, the above symptoms are aggravated by heat (such as sunlight, hot baths, hot steam fumigation) and alleviated by cold. After the discontinuation of hormone topical preparations, the original disease aggravated, while there are obvious hormone-dependent symptoms, that is, the rapid improvement of the condition after the local application of hormones, once the drug is discontinued, less than 1 to 2 days, more than 3 to 5 days, the occurrence of more serious than before hormonal rebound dermatitis, and even induced bacterial, fungal infection. 1. History of exposure More than half a month of history of topical application of hormone preparations at fixed sites, especially strong preparations and the formation of dependence. 2, hormone dependence symptoms and rebound phenomenon, that is, the onset of the drug after discontinuation, rebound aggravation, skin redness, burning, pruritus, severe cases appear edema, repeated use of drugs to reduce the symptoms. 3. Typical skin lesions A variety of lesions with erythema, papules, dryness and flaking as the basic damage, which are difficult to explain by other skin diseases. 4.Differentiation It should be differentiated from acne vulgaris, atopic dermatitis, seborrheic dermatitis, rosacea and other skin diseases. Treatment principles: 1. Complete discontinuation of hormone preparations, such as gradually reducing the intensity and concentration of hormones and extending the interval of use until they are completely discontinued. 2.