Is It a Sinus Headache or a Migraine? How to Tell the Difference

Of all the patients who come to see me convinced they have sinus headaches, only about twenty-five percent actually have a headache originating from sinus disease. The other seventy-five percent have something else — most commonly a migraine. This is not a criticism of the patients who make that assumption. It is a reflection of how convincingly a migraine can feel like it is coming from the sinuses, and how poorly the medical system has communicated the difference.

Getting this diagnosis right matters. A patient who has been treated for sinus infections for years while actually having migraines has been receiving the wrong treatment — and their headaches have been getting worse, not better.

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Why Sinus Disease Produces Facial Pain and Pressure

The head contains four pairs of air-filled cavities — the frontal sinuses behind the forehead, the ethmoid sinuses between the eyes, the sphenoid sinuses deep behind the nose, and the maxillary sinuses in the cheekbones. Each sinus connects to the nasal cavity through a narrow drainage opening — think of this as the narrow middle of an hourglass. When inflammation occurs, that narrow opening swells closed. Air cannot enter. Mucus cannot drain. Pressure builds inside the sinus cavity.

Inside that closed space you have warmth, moisture, and stagnant mucus with bacteria already present. It is the perfect petri dish for bacterial growth. What began as an inflammatory blockage becomes an abscess-like environment. The pressure and the infection together produce the facial pain, the forehead heaviness, the cheekbone tenderness, and the nasal congestion that patients recognize as a sinus headache. That is real sinus-driven pain — and it is diagnosable. A CT scan will show the blocked drainage pathways. An endoscope will show the inflamed mucosa.

Why Migraines Feel Like Sinus Headaches

The reason migraines are so frequently mistaken for sinus headaches comes down to one anatomical structure: the trigeminal nerve. The trigeminal nerve is the primary sensory nerve of the face. It innervates the forehead, the cheeks, the jaw — and the sinuses. It is the same nerve that carries pain signals from sinus inflammation and the same nerve that is activated during a migraine.

When a migraine occurs, neuroinflammation — inflammation of the nerve pathways themselves — triggers the trigeminal system. The result is facial pain and pressure that feels anatomically identical to sinus pain because it is traveling through the same neural architecture. But there is no sinus blockage. There is no infection. The sinuses themselves are normal. The source of the pain is neurological, not anatomical.

Migraines also trigger physical nasal symptoms that deepen the confusion. Nasal congestion, post-nasal drainage, and eye tearing are all recognized migraine-associated symptoms driven by trigeminal activation and the autonomic nervous system changes that accompany a migraine attack. A patient who has a headache, nasal congestion, and eye watering has every reason to believe this is a sinus problem. In many cases it is not.

The Symptoms That Point to Migraine

The distinguishing features of migraine versus sinus disease are specific, and they are often symptoms patients do not volunteer because they do not realize they are relevant to an ENT evaluation. These are the questions I ask in the office that change the diagnosis.

Light sensitivity and sound sensitivity are migraine symptoms. They are not sinus symptoms. A patient who retreats to a dark quiet room during a headache episode is describing a migraine behavior — not a sinus response. Nausea, with or without vomiting, accompanies migraines and does not accompany sinus headaches. Moderate to severe throbbing pain — particularly unilateral, one-sided pain — is the classic migraine pattern. Sinus pain tends to be pressure-like and bilateral, corresponding to the anatomy of the affected sinuses.

Episodic pattern matters. Migraines come and go in discrete attacks. They can last four to seventy-two hours and then resolve, often completely, between episodes. Sinus disease tends to produce more continuous symptoms that fluctuate but do not fully clear between episodes. Worsening with physical activity — bending forward, climbing stairs, exercise — is a migraine feature. And the presence of specific triggers — bright lights, strong smells, certain foods, hormonal changes, weather changes — is characteristic of migraine and not of sinus disease.

Both Can Exist at the Same Time

One of the most clinically challenging presentations is the patient who has both chronic rhinosinusitis and migraines simultaneously. This is not rare. Both conditions utilize the trigeminal nerve pathway for pain transmission, which means they amplify each other. Sinus inflammation lowers the neurological threshold for migraine activation. Migraines drive nasal congestion and drainage through autonomic pathways. The two conditions feed each other, and the patient feels worse than either condition alone would produce.

In these patients, treating only the sinus disease partially improves symptoms. Treating only the migraines partially improves symptoms. The correct approach requires identifying both drivers and addressing both simultaneously — which is why a complete evaluation that includes both CT imaging and a careful migraine history produces better outcomes than treating one problem at a time.

How We Diagnose This in the Office

When a patient comes in with facial pain and headaches, the evaluation at SAWC includes a CT scan and nasal endoscopy at the same visit. If the CT scan shows mucosal thickening in the sinus drainage pathways and the endoscopy shows inflamed mucosa — that is sinus disease. If the CT scan and endoscopy are normal — the anatomy is clean and the mucosa looks healthy — the pain is coming from somewhere else.

A normal CT scan in a patient with significant facial pain and headaches is not a dead end. It is a redirection. It tells me the sinuses are not the source and we need to look upstream at the nervous system. In those patients I ask the detailed migraine symptom questions — light and sound sensitivity, nausea, the throbbing quality, the triggers — and if the migraine picture fits, I prescribe a trial of migraine-specific medication. If the medication works, the diagnosis is confirmed. I also ask about the jaw and the neck, because temporomandibular joint dysfunction and cervical neuralgia both produce referred facial pain that can closely mimic sinus headache and migraine.

The patient who has been treated for sinus infections for years without headache resolution deserves this complete evaluation. The answer is usually there — it just requires asking the right questions and looking at the right things.

Want to Understand More?

This post is part of the Understanding Your Symptoms section of the Airway & Sinus Wellness Review.

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This post is part of the Understanding Your Symptoms section of the Airway & Sinus Wellness Review.

About the Author

Franklyn R. Gergits, DO, MBA, FAOCO is an otolaryngologist and rhinologist with over 30 years of clinical experience. He is the founder of the Sinus & Allergy Wellness Center of North Scottsdale, where he performs in-office balloon sinuplasty, turbinate reduction, NEUROMARK® posterior nasal nerve ablation (Neurent Medical, FDA-cleared radiofrequency ablation system), and Eustachian tube dilation under local anesthesia. He performed the first balloon sinuplasty in Pennsylvania and holds dual Entellus Centers of Excellence certifications. Dr. Gergits is the originator of the Posterior Sinonasal Syndrome (PSS) hypothesis, with a preprint available at Preprints.org (DOI: 10.20944/preprints202603.0858.v1). ORCID: 0009-0000-4893-6332.

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This content is for educational purposes only and does not constitute medical advice. If you are experiencing facial pain, headaches, or sinus symptoms, please consult a qualified physician for evaluation and individualized treatment recommendations.