What Is Migraine Surgery?
Migraine (trigger-site deactivation) surgery is based on the recognition that, in a subset of patients, migraine headaches are triggered or aggravated by compression or irritation of specific peripheral nerves as they pass through muscle, fascia or bone. Surgically releasing or decompressing the nerve at that site can substantially reduce the frequency, duration and severity of migraine attacks in appropriately selected patients. This is an established, evidence-based field within plastic surgery, though it remains a specialist area offered by relatively few centres in the UK.
Trigger Sites
- Frontal — compression of the supraorbital and supratrochlear nerves, often related to overactivity of the corrugator and adjacent muscles
- Temporal — irritation of the zygomaticotemporal branch as it passes through the temporalis muscle
- Occipital — compression of the greater or lesser occipital nerve, often related to neck muscle tension or a tight fascial band
- Nasal/Rhinogenic — trigger points related to contact points within the nose, such as a deviated septum or enlarged turbinates
Many patients have more than one active trigger site, identified through careful history and examination.
Assessment & Patient Selection
Careful patient selection is the single most important factor in outcome. Assessment includes a detailed migraine history (ideally with input from, or in parallel with, a neurologist to confirm the migraine diagnosis and exclude other causes), examination to identify the likely trigger site(s), and — critically — a diagnostic trial of botulinum toxin injection at the suspected trigger site. A strong, if temporary, response to botulinum toxin at a specific site is one of the best available predictors of a good surgical response at that site, and is a standard part of work-up before proceeding to surgery.
Migraine surgery is complementary to, not a replacement for, medical migraine management. Patients are usually already under neurology input, and surgery is considered when migraines remain frequent or severe despite appropriate medical treatment, with a clearly identified trigger site.
The Procedure
Technique depends on the trigger site(s) identified: frontal and temporal sites are often approached endoscopically through small, well-concealed incisions, with removal or release of the muscle segment compressing the nerve; occipital decompression releases the nerve from surrounding fascia and muscle; nasal/rhinogenic triggers are addressed via septoplasty or turbinate reduction. Surgery is typically performed as a day case or with a short stay, and multiple sites can sometimes be addressed in a single operation.
Expected Outcomes
Published outcomes from specialist migraine surgery centres show that a substantial majority of well-selected patients experience a significant reduction in migraine frequency and severity, and a meaningful proportion achieve complete resolution of migraine symptoms. Results are not guaranteed and depend heavily on accurate trigger-site identification — this is why the diagnostic botulinum toxin trial is such an important part of assessment. Full benefit is usually assessed at three to six months after surgery.
Risks
Incomplete Relief
Not all patients respond fully; some retain a reduced level of migraine activity, particularly if an additional trigger site was not fully addressed.
Numbness or Altered Sensation
Temporary, and occasionally longer-term, altered sensation near the surgical site is possible given the nerves involved.
Scarring
Incisions are small and well-concealed; standard surgical scarring risks apply.
Infection & Bleeding
As with any surgery; uncommon and managed with standard care.
Is This Right for You?
Migraine surgery is considered for patients with a confirmed migraine diagnosis, frequent or disabling attacks despite appropriate medical treatment, and a clearly identifiable trigger site supported by a positive response to diagnostic botulinum toxin injection. This is assessed individually and in detail at consultation — not every patient with migraine is a suitable candidate, and this is discussed openly.