I have to have a tooth extraction tomorrow which is fine as it's loose BUT I absolutely hate the pain of the injection.?

How can I best find a way to tolerate this?
Update: Well I had 3 injections but by the time the first two had started to take effect, the third, in the roof of my mouth, I didn't feel at all. Not as bad as I've had in the past. Maybe this dentist is better at her job!!
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