Occipital Nerve Blocks: What Patients Should Know When Headache Starts at the Back of the Head

A patient in Mandarin may describe a stabbing pain at the back of the head that sometimes shoots toward the eye and is tender to the touch. Another in Orange Park may notice a steady ache from the neck up into the scalp that worsens after hours at a desk. Both may have been told that the occipital nerves could be involved, and both may wonder what a nerve block actually does.

Understanding the purpose, limits, and risks of an occipital nerve block may make that conversation easier.

What is an occipital nerve block?

The greater and lesser occipital nerves arise from nerve roots in the upper neck and carry sensation from the back of the head and scalp. They pass through tight muscle and connective tissue near the base of the skull, where they may become irritated. In an occipital nerve block, a physician injects local anesthetic, sometimes combined with a corticosteroid, near one or both nerves.

The block has two purposes. It may temporarily reduce pain, and the response can help a physician judge whether these nerves, or upper-neck structures that share their nerve pathways, contribute to the headache. It does not cure the underlying cause.

Which headaches may it be considered for?

After a careful history and exam, a physician may discuss an occipital nerve block for selected patients with:

• Occipital neuralgia, which often causes shooting, electric, or burning pain from the skull base toward the scalp, with tenderness over the nerve
• Headache that appears to be referred from the upper neck, such as cervicogenic headache
• Certain other headache patterns that have not responded to appropriate medical care, where the exam suggests a nerve contribution

Many headaches do not need a nerve block, and migraine is a common look-alike. The article on how to tell migraine from occipital neuralgia explains the patterns, and the article on cervicogenic headache covers headaches that begin in the neck.

Why the evaluation comes first

Headache has many causes, and some are serious. Before a block is discussed, a physician generally reviews the headache history, medications, neurologic exam, and any prior imaging or specialist care. A new or changing headache pattern may need other evaluation first. A nerve block is considered when the history and exam point toward occipital nerve or upper-neck involvement, not simply because a headache is persistent.

What the procedure involves

An occipital nerve block is an outpatient procedure that is usually brief. In general terms:

• The skin at the back of the head is cleaned, and the nerve is located by landmarks, ultrasound, or sometimes X-ray guidance, depending on the physician’s judgment.
• A small needle places the medicine near the nerve. Patients may feel pressure, a brief sting, or a tingling sensation.
• Patients commonly go home the same day with activity and aftercare instructions from the care team.

Tell your care team about blood thinners, allergies, diabetes, active skin infection, pregnancy, and any past skull or neck surgery, because a bone defect can change how a block is approached. The guide to preparing for an interventional pain procedure lists common questions to ask.

What results to expect

Responses vary. The local anesthetic may numb the back of the scalp within minutes and wear off in hours. If a steroid is included, any additional effect often takes days to appear. Some patients notice relief lasting weeks to months, some have only brief relief, and some notice no change.

Even a short response can be informative, because it may suggest that these nerves are part of the problem. Relief is not guaranteed, and if one block does not help, repeating it is not automatically the best next step. A physician may reassess the diagnosis and the plan.

Possible risks

Occipital nerve blocks are commonly performed, but no procedure is risk-free. Possible effects include soreness or bruising at the injection site, temporary numbness of the scalp, lightheadedness or dizziness, bleeding, infection, and allergic reaction to a medication. When a steroid is used, possible effects include local skin thinning or lightening, hair changes at the site, and short-term effects such as flushing, trouble sleeping, or higher blood sugar in people with diabetes.

Rare but serious complications have been reported with injections near the skull base, including unintended spread of medicine or injection into a blood vessel. The risks that apply to you depend on your health, your anatomy, and the technique used, so ask your physician to review them before you decide.

Options besides a nerve block

Depending on the diagnosis, a stepwise plan often includes measures such as:

• Medications chosen with a physician or headache specialist, taking other health conditions into account
• Physical therapy that may address neck mobility, posture, and muscle tension
• Workstation, sleep-position, and activity adjustments, plus a headache diary to track patterns

When a block gives only short-lived relief, other options may be discussed in selected patients, such as radiofrequency treatment for neck-related pain or, in carefully selected cases, peripheral nerve stimulation for persistent occipital neuralgia (an off-label use). A diagnostic block of the neck joints, as described in Medial Branch Blocks: What Patients Should Know Before Considering Radiofrequency Ablation, may be used when the upper-neck joints are suspected.

What this means for patients

If a headache at the back of the head has persisted despite appropriate care, it is reasonable to ask whether your history and exam suggest the occipital nerves or upper neck are involved, what the realistic goals of a block would be, and which risks apply to you. For many patients the next step is a careful evaluation rather than a procedure.

This article is for general educational purposes only and is not a substitute for a medical evaluation. It does not diagnose any individual’s headache and does not guarantee any particular outcome from treatment.

When to seek prompt medical attention

A sudden, severe headache that reaches full intensity within seconds to minutes, headache with fever and a stiff neck, or headache after a head or neck injury needs emergency evaluation. So do headaches with weakness or numbness on one side, trouble speaking, confusion, fainting, or vision loss; call 911. A new headache after age 50, particularly with scalp tenderness, jaw pain when chewing, or vision changes, also needs prompt evaluation. After any injection, some soreness is expected, but fever, spreading redness, or drainage at the site should be reported to the care team right away. A severe or worsening headache, facial droop, trouble swallowing or speaking, or new weakness is an emergency: call 911 or go to the nearest emergency department rather than waiting for a callback.

The bottom line

An occipital nerve block is one option that may help selected patients whose headache involves the occipital nerves or upper neck, and the response can help clarify the cause. Results vary, relief may be temporary, and risks should be reviewed carefully.

If a headache at the base of your skull keeps returning, a focused conversation about your pattern and exam is a reasonable next step.

Frequently Asked Questions

What is an occipital nerve block?

An occipital nerve block places local anesthetic, sometimes with a corticosteroid, near the greater or lesser occipital nerves at the back of the head. It is used in selected patients with occipital neuralgia or certain neck-related headaches, both to help identify the pain source and to try to ease pain for a period. Relief varies and is not guaranteed.

Does an occipital nerve block work for migraine?

Responses vary. Some patients with migraine report benefit from an occipital nerve block, but the evidence is mixed and it is not a standard first step for everyone. It is most often discussed when the exam suggests occipital nerve irritation or a neck-related contribution. A physician can help decide whether it fits your headache pattern.

How long does relief from an occipital nerve block last?

It varies widely. The local anesthetic may numb the back of the scalp for several hours, and any steroid effect can take days to appear. Some patients notice relief lasting weeks to months, some only brief relief, and some no change. Results are not guaranteed, and repeat blocks are not automatically the best next step.

What are the risks of an occipital nerve block?

Most patients tolerate the procedure well, but risks exist. These may include soreness or bruising at the site, temporary numbness, dizziness or lightheadedness, bleeding, infection, allergic reaction, and, with steroids, local skin thinning or hair changes and short-term effects such as flushing or higher blood sugar. Rare serious complications have been reported. Ask your physician which risks apply to you.

When should I see a doctor right away for a headache?

Seek emergency care for a sudden, severe headache that peaks within seconds to minutes, or a headache with weakness, trouble speaking, vision loss, confusion, fainting, or fever with a stiff neck. A new headache after age 50, especially with scalp tenderness or jaw pain when chewing, also needs prompt evaluation. Call 911 for stroke-like symptoms.

Related patient education

• Is It Migraine, or Occipital Neuralgia? How to Tell the Difference
• Cervicogenic Headache: What Patients Should Know When Headaches Start in the Neck
• Peripheral Nerve Stimulation: What Patients Should Know
• Medial Branch Blocks: What Patients Should Know Before Considering Radiofrequency Ablation
• Preparing for an interventional pain procedure

Related services

• Headache evaluation and treatment overview
• Neck pain evaluation and treatment overview
• Peripheral nerve stimulation service overview