Nervous system block medical treatment 2- epidural block

In the treatment of the sciatic neuralgia, there is a thing to talk called the nervous system block.
When symptoms such as a pain or the numbness came out, I hit the anesthesia to the nervous system transmitting the pain, and I am good, and this is used for the relaxation of lumbago and the sciatic neuralgia by the cure that I let you feel a sense and lose.
The one of the nervous system blocks has a method called the epidural block.
There is the endocranium around the spinal cord in the back and it is a film protecting around the spinal cord, but says a method to let an anesthetic soak between the endocranium and osyokuutsubotai in the circumference.
I inject the anesthetic from a back at this time.
It is said that the effect is low when I compare this block with the Kiyone God block which injects anesthesia into the direct nervous system.
And, as for this epidural block, it is not possible for a person having allergy to an anesthetic or the person who I have other diseases, and are easy to infect bacteria to use anesthesia and a syringe.
As this side effect, there are numbness, dizziness, nausea, a headache, but is said to be it when symptoms are usually relieved for a few days.