To be at a loss about what to do with someone/something; to have difficulty dealing with; to find troublesome or hard to handle.
彼のわがままに先生も手を焼いている。
The teacher is at a loss dealing with his selfishness.
新しいソフトはバグが多くて開発チームが手を焼いている。
The new software has many bugs, and the development team is having a hard time with it.
子犬が夜中に鳴いて、飼い主は本当に手を焼いている。
The puppy cries at night, and the owner is really having trouble with it.
この問題は複雑で私一人では手を焼くので、誰か手伝ってください。
This problem is complicated and I'm at a loss by myself, so please help me.