Burn the candle at both ends

Burn the candle at both ends　朝から晩まで忙しく動き回る、無理なことをして疲れ果てる

It means to exhaust yourself by doing too much, especially going to bed late and getting up early.

特に遅くにベッドに入って朝早くに起きる事で行動しすぎて疲れ果てる

（e.g.）

He is been burning the candle at both ends for the entrance examination.

彼は入試試験のために疲れ切っている。