Chinese

		chest and abdomen	's; him/her/it; this	misfortune; suffer (from illness); trouble misfortune; suffer (from illness); trouble; danger; worry; to contract (a disease)
simp. and trad. (心腹之患)		心腹	之	患

Noun

心腹之患

1. disease in one's vital organs; serious hidden trouble or danger; a thorn in one's side