illness; disease; patient; sufferer

a danger concealed within sth; hidden damage; misfortune not visible from the surface

future trouble

packed with people; overcrowded; overpopulation

injured person

doctor-patient

foreign aggression

suffering; misery; hardship

flooding; inundation

disaster; calamity

to suffer (from an illness); to fall ill

foreign invasion; disaster on border due to incursion

to take preventative measures; to guard against accident or disaster

rat infestation

variant of 養癰遺患|养痈遗患[yang3 yong1 yi2 huan4]

lit. to foster an ulcer and bequeath a calamity (idiom); tolerating budding evil can only lead to disaster; to cherish a viper in one's bosom

lit. to nurture a tiger invites calamity; fig. to indulge one's enemy is asking for trouble (idiom)

Rear a tiger and court disaster. (idiom); fig. if you're too lenient with sb, he will damage you later; to cherish a snake in one's bosom

internal trouble and outside aggression (idiom); in a mess both domestically and abroad

to tolerate is to abet

heart disease

lit. calamity within one's bosom (idiom); major trouble hidden within

Preparedness averts peril.; to be prepared, just in case (idiom)

mental illness

having experienced much suffering

dissociative identity disorder; multiple personality disorder