Worried about her son's condition, she didn't sleep a wink all night.
Tips
usage
A literary 4-character set phrase rather than a canonical chengyu - it's not in the 新华成语词典. Use it in writing for situations of intense worry, work, or grief. The everyday colloquial equivalent is 一整晚没睡 (yì zhěng wǎn méi shuì).
