Eczema can be selective application of dermatropin, because eczema is an allergic disease, choose the intermediate-acting glucocorticoid drug dermatropin, the composition of which is mainly dexamethasone acetate, can play a very good anti-allergic, anti-itching, immunosuppressive therapeutic effect. Its main eczema rash for the erythema, papules, maculopapular rash, papules and other acute phase of the rash, can also be applied to the chronic phase of hypertrophy, mossy eczema manifestations, accompanied by intense itching when applying this drug can play a very good therapeutic effect. But for the emergence of acute, subacute eczema, with the production of vesicles, oozing and other manifestations, the application of this drug can not play a good therapeutic role, on the contrary, due to the coverage of the drug, resulting in the weakening of local heat dissipation, which led to the exacerbation of eczema, so the application should be used under the guidance of a doctor.