only a skin complaint some slight ailment; a negligible ill ? 累曰： “張魯犯界，乃～?！?《三國演義》519) Wang Lei said，“A Zhang Lu invasion would be but a skin disease.”
癬疥之疾xuǎn jiè zhī jí
癬疥：指兩種皮膚病的名稱。比喻危害不大的小病、小問題。some slight ailment, only a skin disease, a negligible ill