Peripheral nerve blocks (the nerve is infiltrated with a local anesthetic) have long been used in headache treatment, in cluster headache, chronic daily headache, occipital neuralgia, trigeminal neuralgia, and migraine.
Nerve blocks can relieve pain from several hours to several months.
There are clinical data about ineffectiveness of nerve block therapy for chronic tension headache.
A study has shown that patients had worse headache in hours or days following the injection, had the same , unchanged intensity of headache before injection, and ones with pain at the injection site.
Generally, peripheral nerve block technique, used for any type of headache, has complications allergy reactions, infections, and increased pain.
Although, the cause for neuralgia can be unknown or unidentifiable, it is important to try to find the cause.
Chemicals can cause nerve irritation. Inflammation, trauma (including surgery), compression by adjacent structures (tumors or inflamed tissues), and infections, all can lead to neuralgia.
Surgery may be helpful if the cause is determined.