What is a nerve block?

Injection of local: It is when local anesthesia is used to numb a nerve or group of nerves (plexus). It usually entails knocking out the motor component as well as sensory but some blocks can be performed so that only sensory is blocked. Sedation is usually used and an ultrasound machine or stimulating needle to locate the proper site for injection.

When a : Nerve is exposed to local anesthesia, sodium channels are blocked temporarily, preventing the transmission of an electrical impulse down the nerve's axon. As a result, messages are not transmitted by the nerve. The nerve is "blocked". The duration of the block depends on the medications used and location of the block.

Pain relief: Usually steroid and local anesthetic is injected to help relieve pain.