only a skin complaint some slight ailment; a negligible ill ❍ 累曰： “张鲁犯界，乃～。”(《三国演义》519) Wang Lei said，“A Zhang Lu invasion would be but a skin disease.”
癣疥之疾xuǎn jiè zhī jí
癣疥：指两种皮肤病的名称。比喻危害不大的小病、小问题。some slight ailment, only a skin disease, a negligible ill