I just had a nerve block in the lower back of my head for migraines that have not responded to other treatments. How long will this last?

Hello. Thank you for posting.

An occipital nerve block is a minimally invasive procedure that is often performed in an outpatient setting. It can be effective for the management of various headache conditions.  Occipital nerve blocks inhibit the pain signals that are sent to the brain that are normally processed and perceived as headache pain. The pain relief experienced from an occipital nerve block varies among patients and for some, may last up to several months. Patients can have repeat occipital nerve blocks to manage their headache pain symptoms. 

Helena