Symmetrical skin diseases are as follows: 1, eczema: can appear rash symmetrical distribution, the performance of the boundaries are unclear. The treatment can be static point compound glycopyrrolate monoamine injection, or compound glycopyrrolate injection, with oral orotadine hydrochloride tablets or loratadine citrate capsules, topical mometasone furoate ointment, or hydrocortisone butyrate ointment such glucocorticoid ointment, with butyl hydroxy acid ointment, flufenamic acid butyl ointment non-steroidal anti-inflammatory ointment. 2, psoriasis: can appear erythematous scaly rash such The characteristic rash performance of psoriasis, accompanied by a certain amount of itching. In terms of treatment, you can take oral amineptin tablets, combined with anti-silver granules, or danqing capsules, topical tacalcitol ointment, carbotriol ointment, with dinaide ointment for treatment.