live on (one's) nerves
To be in a constant state of anxiety, fear, or worry. Marty seems to be living on his nerves ever since the accident.
live on your nerves
BRITISHIf someone lives on their nerves, they are always worried and anxious, usually because they are in a difficult situation. In the run-up to the election she was living on her nerves.
live on your nerves (or your nerve ends)
be extremely anxious or tense.