外用药物疗法在皮肤病的临床治疗上占有重要地位,外用药的正确使用,不仅可减轻患者的自觉症状,还可促使皮肤损害迅速好转并痊愈,反之,如果使用方法不当则可加重病情。外用药物治疗原则,首先要根据病因、临床表现来选择适当的药物。为了能使药物最大限度地发挥作用,需要将主药配成各种不同的剂型,剂型的选择与主药有同等的重要性,而剂型则应根据病因、皮损情况和病变部位等特点来选定。如剂型不当,即使主药正确,也不可能达到理想 External drug therapy plays an important role in the clinical treatment of dermatosis. The correct use of external drug can not only relieve the patients’ symptoms, but also prompt the skin damage to heal and heal. On the contrary, if the improper use can aggravate the condition. Topical drug treatment principles, first of all according to the etiology, clinical manifestations to choose the appropriate drug. In order to maximize the effectiveness of the drug, it is necessary to formulate the main drug into a variety of different dosage forms. The choice of dosage form is of equal importance with the main drug. The dosage form should be based on the characteristics of the etiology, lesion and lesion site Selected. Such as improper dosage form, even if the main drug is correct, it is impossible to achieve the desired