The phrase "does a number on" is typically used to describe something that has caused damage or harm in some way. Some antonyms for this phrase could include "benefits," "improves," "elevates," or "enhances." These words indicate positive outcomes and suggest that something has had a beneficial effect on a situation, rather than causing damage. For example, a new therapy might "improve" someone's mental health, while a kind gesture could "benefit" a friend who is going through a hard time. By using antonyms of "does a number on," we can shift our language to focus on positive and constructive actions, rather than negative impacts.