NERVE BLOCK FOR PAIN RELIEF
A nerve block relieves pain by interrupting how pain signals are sent to your brain. It is done by injecting a substance, such as alcohol or phenol, into or around a nerve or into the spine.
Nerve blocks may be used for several purposes, such as:
Nerve blocks are used to treat chronic pain when drugs or other treatments do not control pain or cause bad side effects.
Nerve blocks numb the nerves touched by the drugs. This relieves pain by interrupting the pain signal sent by the nerves to your brain. Depending on the type of nerve block, your pain may be numbed for a short time or a long time.
Nerve blocks for chronic pain may work for 6 to 12 months. They may have to be repeated.
Nerve blocks can cause serious complications, including paralysis and damage to the arteries that supply blood to the spinal cord. Other possible side effects include severely low blood pressure (hypotension), accidental injection of the alcohol or phenol into an artery, puncture of the lung, damage to the kidneys, diarrhea, and weakness in the legs.
Nerve blocks are not recommended if you have a disease that affects blood clotting, are taking blood-thinning drugs (such as heparin or warfarin), have a bowel obstruction, or have any type of uncontrolled infection.