Hemicrania
Hemicrania is a rare headache disorder that causes pain on one side of the head. The name refers to one-sided head pain, but clinically, hemicrania includes specific headache disorders with recognizable patterns. The two most important forms are hemicrania continua and paroxysmal hemicrania.
Hemicrania continua usually causes continuous one-sided headache lasting more than three months. The pain may fluctuate, with periods of worsening that feel more intense or disabling. Paroxysmal hemicrania causes shorter, severe one-sided attacks that may happen many times in a day.
Both conditions may include autonomic symptoms on the same side as the headache. These can include eye tearing, eye redness, nasal congestion, runny nose, eyelid swelling, facial sweating, pupil changes, eyelid drooping, or restlessness.
Why Hemicrania Can Be Missed
Hemicrania is often missed because it is rare and can resemble more common headache disorders. Patients may first be treated for migraine, sinus headache, tension headache, TMJ-related headache, dental pain, or cluster headache.
This can be frustrating for patients whose symptoms do not fully match the diagnosis they were given. A patient with hemicrania continua may have a constant one-sided headache that never fully goes away. A patient with paroxysmal hemicrania may have short, severe attacks many times per day. These patterns are different from many migraine or sinus headache patterns.
MPM evaluates the full headache history, including when symptoms began, whether the pain stays on one side, whether it is continuous or attack-based, how long attacks last, what symptoms occur with the pain, and which treatments have or have not helped.
Hemicrania Continua vs. Paroxysmal Hemicrania
Hemicrania continua is typically continuous. The pain remains on one side and persists for months, although intensity may rise and fall. Patients may describe a baseline headache with flares that become more severe.
Paroxysmal hemicrania is typically attack-based. Attacks are usually shorter but may be severe and frequent. Some patients experience several attacks per day. These attacks may include eye tearing, nasal congestion, eyelid changes, facial sweating, or restlessness.
Both conditions are known for a strong response to indomethacin when the diagnosis is correct. This medication response is an important diagnostic clue, but it must be considered carefully because indomethacin is not safe or appropriate for every patient.
Hemicrania vs. Migraine
Migraine is a neurological headache disorder that may cause throbbing pain, nausea, vomiting, light sensitivity, sound sensitivity, aura, dizziness, and functional impairment. Migraine can be one-sided, so it may sometimes be confused with hemicrania.
Hemicrania is usually strictly one-sided and may include autonomic symptoms such as eye tearing, nasal congestion, runny nose, eyelid changes, facial sweating, or restlessness. The pattern of pain, duration, frequency, and medication response helps distinguish hemicrania from migraine.
Some patients have more than one headache pattern. A person may have migraine and also have another headache disorder. This is why MPM reviews the full clinical picture rather than assuming one diagnosis explains every symptom.
Hemicrania vs. Cluster Headache
Cluster headache is another severe one-sided headache disorder with autonomic symptoms. It usually causes attacks lasting 15 to 180 minutes, often around the eye, temple, or forehead. Attacks may happen in cycles over weeks or months.
Paroxysmal hemicrania can resemble cluster headache but tends to involve shorter and more frequent attacks. Hemicrania continua is different because it is continuous rather than occurring only in discrete attacks.
Because hemicrania, cluster headache, and other trigeminal autonomic cephalalgias can look similar, accurate diagnosis requires careful review of attack duration, frequency, timing, autonomic symptoms, and medication response.
The Role of Indomethacin
Indomethacin is important in hemicrania because hemicrania continua and paroxysmal hemicrania are known for a strong response to this medication. In the right clinical context, an indomethacin trial can help support the diagnosis.
However, indomethacin is not a simple or risk-free test. It can cause gastrointestinal irritation, ulcers, bleeding risk, kidney concerns, cardiovascular risk, blood pressure issues, and medication interactions. Some patients cannot take it safely, and others cannot tolerate it.
MPM evaluates whether an indomethacin trial is appropriate based on the patient’s medical history, medication list, risk factors, prior response, and overall headache pattern. If indomethacin is not appropriate, other treatment strategies may be considered under clinician supervision.
How MPM Evaluates Hemicrania
MPM takes a diagnosis-first approach to one-sided headache. The evaluation may include a detailed headache history, neurologic symptom review, medication review, prior imaging review, and assessment of overlapping pain contributors.
The team considers whether symptoms fit hemicrania continua, paroxysmal hemicrania, cluster headache, migraine, tension headache, trigeminal neuralgia, TMJ-related headache, sinus disease, cervicogenic headache, or another condition.
MPM also evaluates whether neck pain, jaw dysfunction, facial pain, autonomic symptoms, chronic pain sensitization, sleep disruption, stress physiology, or medication overuse may be contributing to the headache pattern.
Treatment Options for Hemicrania
Treatment depends on the diagnosis and safety profile. When hemicrania is suspected, medication management is often central. Indomethacin may be considered when clinically appropriate, but it requires careful monitoring and is not suitable for every patient.
If indomethacin is contraindicated or poorly tolerated, the clinician may discuss other medication strategies or coordinate with neurology. Supportive care may also be helpful when patients have overlapping neck pain, jaw tension, chronic pain distress, sleep disruption, or nervous system sensitivity.
Biofeedback, pain psychology, acupuncture, and movement-based support may help selected patients manage headache-related stress physiology, flare patterns, sleep disruption, and function. These approaches do not replace headache medication or neurologic evaluation, but they may support a broader care plan.
Procedures such as trigeminal nerve block, trigger point injections, botulinum toxin, or infusion-based options should not be presented as standard hemicrania treatments for every patient. They may be considered only when the diagnosis, pain generator, and clinical pattern support them.
When Urgent Evaluation Is Needed
Not every one-sided headache is hemicrania. Severe or new headache symptoms should be evaluated carefully, especially when the pattern changes or neurological symptoms appear.
Patients should seek urgent evaluation for sudden worst headache, new weakness or numbness, facial droop, speech difficulty, vision loss, confusion, fainting, seizure, fever, stiff neck, head injury, cancer history, immune suppression, pregnancy with severe headache, new headache after age 50, or a major change in headache pattern.
How MPM Approaches Hemicrania Care
MPM approaches hemicrania through a diagnosis-first, coordinated model. The goal is to identify whether the headache pattern fits hemicrania continua, paroxysmal hemicrania, migraine, cluster headache, another TAC, trigeminal neuralgia, TMJ-related headache, or another cause of one-sided head or facial pain.
For patients looking for hemicrania treatment in NYC or Manhattan, MPM offers a careful headache and pain medicine perspective focused on rare headache recognition, medication evaluation, autonomic symptom review, cervical and facial pain overlap, and coordinated treatment planning.
The goal is to clarify the diagnosis and guide appropriate next steps without overpromising outcomes.