What could be the cause of shaky hands after dental numbing?

Yesterday I went to the dentist to get a filling and when they numbed me my hands started shaking. They stopped after the procedure but that has never happened before. I had just eaten so it wasn't that and I have never had a reaction before. I just went a few weeks ago and I was fine.

Answers:
It may have been the Epinephrine that is inside of the local anesthetic used to get you numb. Epinephrine is basically adrenaline. Used in the "fight or flight" process your body automatically produces adrenaline when a certain stressful event occurs. When it is introduced via local anesthetic the symptoms you have certainly match what can happen when epinephrine is injected and enters the bloodstream. Your blood vessels constrict, heart rate increases.

This varies a lot amongst patients. A little epi for someone may induce hand shaking and sweating for one person one day and not produce the same symptoms for the same patient the next day. Ask your dentist to use a lower concentration of epi next time. Some local anesthetics have no epi. however, the duration of action and onset is less when using these types of anesthetics. I tend to always use local anesthetic with epi. in it because it works faster and it lasts longer.
Maybe hit a nerve with the needle? Wouldnt be the first time it has happened.
You were probably very nevous, and once it was all done you automatically relaxed. Needles are scarey i don't blame you
I see it all the time with my patients. Its perfectly normal. Its that you were nervous. The dentist must know how to work/calm patients down. A lot of patients come nervous to the clinic because they have the idea that dentist=pain. Sometimes our anesthetic doesn't work because the patient is nervous. The best thing to do before going to the dentist is staying calm/relaxed, and having a good friend relationship with your dentist, therefor you'll see your dentist as a friend.
i just went to the dentist for something similar and my hands and feet started to shake when they used air and water on my nerves and he said it was because the nerve was open or extracting or something maybe they hit nerves

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