What is local anesthesia? Learn about when and why it's used, its types, and its side effects and safety. ... You breathe gas through a mask or get an injection and fall asleep.

Local and regional anesthesia are usually injected into a group of nerves in a specific part of the body. The medicines travel to the brain and prevent neurons from receiving pain signals from the ...

With local or regional anesthesia, you will be awake but free of pain (you may still feel pressure during your procedure). If you are sedated, you’ll feel relaxed and drowsy and may fall asleep.