- 摸不着头脑 mōbuzháotóunǎo confusedto be unable to make any sense of the matter or to be at a loss
- 冲昏头脑 chōnghūntóunǎo lose one's headto be carried away by success or intense emotion, resulting in a loss of rational judgment; to let something go to one's head
- 头脑简单四肢发达 tóunǎojiǎndānsìzhīfādá brawny but brainlessall brawn no brains
- 头脑风暴 tóunǎofēngbào brainstorming
- 头脑清楚 tóunǎoqīngchu clear-headedhaving a clear, alert, and lucid mind, especially after being tired or confused
- 头脑发胀 tóunǎofāzhàng conceitedfiguratively being swellheaded, arrogant, or overconfident
- 丈二和尚，摸不着头脑 zhàng'èrhéshang, mōbuzháotóunǎo baffledto be at a total loss; to be unable to make head or tail of a situation