I feel suffocated if I don't speak out.

骨鲠在喉,一吐方快.

《现代汉英综合大词典》

I feel suffocated. Would you be kind enough to stop smoking?

我感到憋闷,请您别再吸烟了好 吗 ?

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The hot weather in summer makes me feel suffocated.

炎热的天气让人觉得胸口发闷.

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I feel suffocated if I don't speak out; have an opinion one cannot suppress.

如骨鲠在喉, 一吐方快.

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