蝨多不癢

many fleas, but unconcerned (idiom); no point in worrying about one debt when one has so many others / Troubles never come singly. / It never rains but it pours.

louse

many; much / too many; in excess / (after a numeral) ... odd / how (to what extent) (Taiwan pr. [duo2]) / (bound form) multi-; poly-

no; not so / (bound form) not; un-

to itch / to tickle