Supraorbital Nerve Block: Simple Anatomy, Thin Evidence

The supraorbital nerve block anaesthetises the forehead and anterior scalp through a terminal branch of the ophthalmic division of the trigeminal nerve. It is anatomically straightforward, quick, and performed by palpation — the supraorbital notch or foramen is usually felt at the medial third of the orbital rim, roughly in line with the pupil.

It is used for supraorbital neuralgia, for herpes zoster ophthalmicus and its post-herpetic sequelae, for forehead laceration repair, and as a component of scalp block. The honest position is that the block is well established in practice and thinly represented in controlled evidence. This reference sets out the anatomy, what can and cannot be claimed for it, and where the useful comparative data actually sit. It belongs under our clinical reference to nerve blocks in outpatient pain practice.

Two nerves, not one

The frontal nerve divides into the supraorbital and supratrochlear nerves. The supraorbital exits at the supraorbital notch and supplies the forehead and anterior scalp back toward the vertex. The supratrochlear exits about a centimetre medially and supplies the medial forehead, the bridge of the nose and the medial upper eyelid.

Blocking only the supraorbital nerve therefore leaves the medial forehead sensate, which is the commonest cause of an apparently partial block. For forehead coverage the two are usually blocked together, which is achieved by directing the deposit medially from a single entry rather than by a second puncture.

The nerve is superficial, the foramen is palpable in most people, and the orbital rim is the bony backstop that keeps the needle out of the orbit.

What can be claimed

There is no meaningful body of randomised evidence for the supraorbital nerve block as a treatment for chronic headache, and it should not be presented as though there were.

The useful comparison is with its neighbour in the same clinical territory. The greater occipital nerve block — which shares the indications of migraine and cervicogenic headache — has been studied properly, and a 2026 systematic review and meta-analysis of twelve studies in 658 patients found ultrasound-guided blockade reduced pain intensity, monthly headache frequency, headache duration and monthly analgesic use. That review also found a meaningful difference by injection site, with proximal injection reducing monthly headache days more than distal.

Two things follow. First, the occipital literature shows what an adequately studied cranial nerve block looks like, and the supraorbital block has no equivalent. Second, the proximal-versus-distal finding is a reminder that where the injectate is placed changes the result, which is exactly the variable that is unstandardised in supraorbital practice.

Occipital nerve block evidence and the indications it does and does not support are summarised in the nerve blocks reference, and the occipital technique itself in occipital nerve block.

Herpes zoster and post-herpetic neuralgia

The ophthalmic division is a common site for herpes zoster, and the trigeminal territory features in the zoster-associated pain literature. A 2026 network meta-analysis compared non-oral therapeutic interventions for zoster-associated pain, and a 2026 Korean Pain Society clinical practice guideline addressed refractory post-herpetic neuralgia.

These are the documents to reason from, and they concern the broader management of zoster pain rather than the supraorbital block specifically. A pain practice offering the block for ophthalmic zoster is on reasonable anatomical ground and thin trial ground, and should say so.

Safety

This is one of the lower-risk blocks in practice. The principal cautions are mechanical and cosmetic rather than systemic:

• Keep the needle out of the orbit. Directing the needle inferiorly or advancing into the foramen risks orbital injury and nerve trauma; the deposit is made adjacent to the foramen, not within it.
• Periorbital bruising and swelling are common and alarming to an unwarned patient, because they track down into the eyelid over a day or two.
• The supraorbital and supratrochlear arteries accompany the nerves, so intravascular injection and haematoma are the vascular concerns.

Volumes here are small, so systemic toxicity is rarely the limiting factor — but when the block forms part of a full scalp block, the cumulative dose across all nerves is the number that matters. That arithmetic, and the management of local anaesthetic systemic toxicity, is in the nerve blocks reference.

For clinicians

This block is learned by palpating a real orbital rim, because the position of the notch varies between people and a diagram cannot convey it. This reference carries no needle depths or angles for that reason.

Empire teaches the supraorbital nerve block alongside the other head and neck blocks within Advanced Musculoskeletal Ultrasound Guided Injections, part of the pain management academy.