expression, ichidan verb
be worried about; be concerned about; rack one's brains over
Used when someone is troubled or stressed by a problem, often implying mental effort or anxiety. The subject is typically a person, and the cause of worry is marked with に or で.
彼は将来のことで頭を痛めている。
He is worried about his future.
社長
The company president is racking his brains over cash flow.