Quitting can lead to anxiety and depression, resulting from nicotine withdrawal.

戒烟可导致焦虑和抑郁，由于戒断尼古丁造成的。

At the 72-hour mark, nicotine withdrawal peaks with headache, nausea, and cramps, as well as emotional symptoms like anxiety and depression.

停止戒烟72小时，尼古丁戒断高峰症状包括头痛、恶心和痉挛，以及情绪上的症状，比如焦虑和抑郁。

Symptoms of nicotine withdrawal include severe craving for nicotine, irritability, anxiety, anger, poor concentration, restlessness, impatience, increased appetite, weight gain, and insomnia.

尼古丁戒断综合征包括对尼古丁的极度渴望、烦躁、焦虑、易怒、注意力不集中、坐立不安、急躁、食欲增加、体重增加和失眠等症状。

All smoking does is remove the distraction of nicotine withdrawal.

吸烟的全部作用就是消除尼古丁戒断的干扰。