后患无穷

Learn Today's Idiom (成语)

后患无穷

hòu huàn wú qióng

It will cause no end of trouble; endless trouble

Traditional:

後患無窮

如果这个瘤子现在不摘除, 恐怕后患无穷。

If you don't have the tumour removed now, I'm afraid there will be all hell to pay.