"Burning the candle at both ends" is a commonly used phrase to describe someone who is overworking themselves or pushing themselves too hard. However, there are several other phrases that can be used as synonyms to convey the same meaning. These include "running on fumes," "pushing oneself to the limit," "working oneself to exhaustion," and "living life in the fast lane." All of these phrases describe a situation where the individual is putting in excessive effort without taking the necessary rest or self-care, which can lead to burnout and decreased productivity in the long run. It is important to recognize when we are pushing ourselves too hard and to prioritize self-care and rest to avoid burning out.