To burn the candle at both ends

Meaning

To work very hard and overexert oneself

Examples

• John: I've been working late every night and barely sleeping.
• Alice: You're <b>burning the candle at both ends</b>! You'll burn out.
• John: I know, but I have a deadline.
• Alice: You need to take some time off; you can't keep <b>burning the candle at both ends</b>.