If you've been offered an "occipital nerve block" for stubborn headaches, it's worth understanding what it actually is — because it does two jobs at once. A nerve block is a small injection that can quiet the pain, and in the same appointment it can tell you where the pain is coming from and what treatment is likely to work next. That dual role is what makes it so useful.
What a nerve block is
An occipital nerve block is an injection of local anesthetic — often combined with a corticosteroid to calm inflammation — placed near the occipital nerves at the base of the skull. Those nerves carry sensation from the back of the head, and numbing them temporarily interrupts the pain signal traveling along them (occipital nerve block for headaches: a narrative review).
It's a quick, minimally invasive office procedure. It can be used for several stubborn headache conditions — occipital neuralgia, chronic and episodic migraine, cluster headache — either on its own or alongside standard headache care (occipital nerve block narrative review). It's generally well tolerated, with side effects usually limited to the injection itself, like brief numbness, tingling, or local soreness.
The diagnostic half: what a block tells you
Here's the part that's easy to overlook. A nerve block isn't only a treatment — it's information. If numbing the occipital nerves relieves your headache, that result points to those nerves as the source of the pain and helps confirm the diagnosis. If it doesn't help at all, that's useful too, because it steers the search elsewhere.
This diagnostic value is central across nerve-driven head and neck pain. Controlled blocks are considered the most objective way to prove that a specific nerve or joint is the pain generator, precisely because the response is measurable — the pain either resolves when the target is numbed or it doesn't (controlled diagnostic blocks for headache source). A block, in other words, answers a question that history and imaging often can't.
The therapeutic half: real relief
A block isn't only diagnostic — it can genuinely help. In chronic migraine, a systematic review and meta-analysis found that greater occipital nerve blocks reduced headache frequency and intensity (greater occipital nerve block meta-analysis for chronic migraine). Randomized trial data similarly show meaningful reductions in the severity and frequency of migraine after occipital nerve block (preventive effect of greater occipital nerve block).
The catch is duration. Relief from a single block commonly lasts from weeks to a few months rather than indefinitely. Repeating blocks can extend the benefit for some people. But when relief is real yet temporary, the block has still succeeded — it has confirmed the source and pointed the way to something more durable.
How a positive block guides what comes next
This is where the block earns its keep. A positive response — meaningful relief when the nerves are numbed — predicts who will respond to more targeted treatment. It converts the next decision from a guess into a plan.
When blocks help but the relief keeps fading, the same nerves the block identified can be treated more durably. Radiofrequency treatment uses heat delivered through a fine needle to interrupt those specific nerves; in chronic migraine, pulsed radiofrequency of the greater occipital nerve has been compared directly against repeated blocks, with the procedure offering longer-lasting benefit for appropriate patients (repeated occipital nerve block vs. pulsed radiofrequency, randomized trial). Nerve stimulation offers another targeted route and is reversible and trialed first, so relief is experienced before anything permanent is chosen. The evidence for these nerve-directed options is still maturing and positive, and candidacy is individualized — but each is aimed squarely at the nerves the block already flagged as responsible.
That's the logic worth remembering: a nerve block is a low-commitment first move that both relieves pain and shows you, and your care team, exactly where to aim next.
If stubborn head or neck pain hasn't responded to the usual approaches, our headache and neuralgia assessment is a plain-language place to start, and you can explore the treatments we offer for headache and neuralgia in more detail.
