"Burning the candle end" is a common idiom used to describe a situation where one exhausts their energy or resources to the point of their limit. Some common synonyms for this phrase are "burning the midnight oil," "pushing oneself to the limit," "running on fumes," and "stretching oneself too thin." These phrases all express the same idea that one is working or exerting themselves beyond what is sustainable, often leading to exhaustion or burnout. It is important to take breaks and rest, as overworking oneself can lead to negative consequences both physically and mentally.