Are Eye or Nose Symptoms Needed for Hemicrania Continua?

No, you do not need to experience tearing, a blocked nose, or other eye and nose symptoms during every flare-up to be diagnosed with hemicrania continua (HC). While these are common symptoms, the diagnostic criteria allow for a variety of different signs, and they do not have to be present during every single pain spike.

How the ICHD-3 Criteria Work

Under the International Classification of Headache Disorders, 3rd edition (ICHD-3), hemicrania continua is defined by a continuous, strictly one-sided headache present for more than three months ^[1]. On top of this background pain, patients experience spikes or “exacerbations” of more severe pain ^[1].

During these exacerbations, the criteria require that you experience at least one of the following on the same side of your head as the pain, or a general sense of restlessness, or aggravation of pain by movement ^[2][3][1]:

• Eye symptoms: Tearing (lacrimation), eye redness (conjunctival injection), a drooping eyelid (ptosis), or a pupil that becomes smaller (miosis) ^[2].
• Nose symptoms: A blocked nose (nasal congestion) or a runny nose (rhinorrhea) ^[2].
• Other facial or ear symptoms: Eyelid swelling (edema), sweating on the forehead and face, forehead or facial flushing, or a sensation of fullness in the ear ^[2].
• Restlessness: A feeling of agitation or an inability to sit still ^[3].
• Movement Aggravation: The pain is made worse by physical movement ^[1].

Because you only need to meet one of these requirements, a diagnosis is entirely possible without ever experiencing tearing or a blocked nose, provided you experience another autonomic symptom, feel restless, or have your pain aggravated by movement during the pain spikes. In one meta-analysis of adult patients at headache clinics, tearing (72.3%) and eye redness (69.8%) were the most common accompanying symptoms, but restlessness was also frequently reported (60.2%) ^[4]. These numbers are observations from a specific study population, not requirements for a diagnosis.

Do Symptoms Happen During Every Flare?

Even if you do experience cranial autonomic symptoms (like a runny nose or tearing), they do not have to occur during every single exacerbation ^[5][6]. Clinical research acknowledges that these accompanying symptoms can be highly variable from one flare to the next, and sometimes they may be absent during an individual pain spike ^[5][6].

However, if you never experience any ipsilateral autonomic symptom, restlessness, or movement aggravation during any of your exacerbations, the strict ICHD-3 criteria for hemicrania continua are not met. In that case, your doctor will need to consider other headache disorders.

The Importance of Medical Assessment and an Indomethacin Trial

Hemicrania continua is a clinical diagnosis. This means your doctor must carefully assess your history, perform an examination, and rule out other causes ^[1]. A new or changing continuous, one-sided headache requires medical evaluation. Seek urgent medical care if you experience a sudden severe headache, new neurologic or visual symptoms, fever, or a stiff neck.

A defining feature of hemicrania continua is a complete (absolute) response to an adequate therapeutic trial of a prescription medication called indomethacin ^[1]. However, this trial must be closely supervised by a clinician. Indomethacin is a powerful nonsteroidal anti-inflammatory drug (NSAID) that can cause stomach ulcers, gastrointestinal bleeding, kidney injury, and cardiovascular complications, and it can interact with other medications. It may also be unsafe during pregnancy or if you have certain medical conditions. A supervised trial ensures the correct dose is tested safely and monitored for side effects.