noun, noun or participle which takes 'suru', intransitive verb
catching a cold from sleeping uncovered; chill-induced illness
Refers to getting sick, especially with a cold, because one got cold while sleeping (e.g., kicking off blankets). Often used as a noun or with する to describe the event.
昨夜は布団をかけずに寝て、寝冷えをしてしまった。
Last night I slept without a blanket and caught a cold from it.
子
Please make sure to cover the child with a blanket so they don't catch a chill while sleeping.