如鲠在喉

Explanation: Fish bone stuck in the throat. Metaphor have in mind would not say it, very uncomfortable. 　　Source: Han Xu Shen, "Dictionary" choke, left pharyngeal bone is also fresh. "Note Duan Wei said 'bone so stuck, stabbed people.' Lost than won, such as fresh bone in the throat, Gu Yun Chen honest and frank." Han, "The following are as stuck, word from the fish, the fish that were left pharyngeal bone more people. "