a carbuncle neglected becomes the bane of your life
As a Chinese idiom, Pinyin is y ǎ ngy ō ngy í Hu à n, which means connivance and cover up bad people and bad things, resulting in disaster. It comes from the biography of Feng Yan in the book of the later Han Dynasty.
Analysis of Idioms
[synonym] the legacy of raising a tiger, endless future troubles, and the danger of raising a carbuncle
The origin of Idioms
Li Xian's annotation of Feng Yan's biography of the later Han Dynasty quoted Feng Yan's book of Ren Wu Da with his wife and younger brother: "nourishing carbuncle and growing gangrene is a natural disaster."
Idiom usage
Contraction; predicate, object, attribute; derogatory. I call it Yefu because of the fact that we have a false name of being rich and virtuous and that we have been defeated and broken. (notes of Yuewei thatched cottage by Ji Yun in Qing Dynasty)
a carbuncle neglected becomes the bane of your life
be in the centre of the axle -- hold an important official post - dāng zhóu chǔ zhōng
draw lessons from history in order to avoid such happenings in the future - yǐ wǎng jiàn lái