Does ALS Cause Headaches? Causes and Management

ALS does not directly attack the pain-sensing structures that produce headaches, yet headaches are remarkably common in people living with the disease. In a study of 100 patients with clinically definite ALS, 79 reported headaches, and roughly a third of those with primary headaches saw them appear or worsen only after their ALS diagnosis. The causes turn out to be varied, ranging from respiratory insufficiency and neck muscle weakness to side effects of ALS medications, and each cause points toward a different management strategy.

How Common Are Headaches in ALS

For years, headaches were considered an uncommon complaint in ALS because the disease primarily targets motor neurons rather than sensory pathways. That assumption has not held up well. A detailed interview study of 100 ALS patients found that nearly four in five reported headaches of some kind. Among those, about three-quarters had primary headaches, meaning headaches not caused by another medical condition. Tension-type headache was the most frequent, affecting 46 patients, while migraine was identified in 16. An additional 15 patients had secondary headaches traceable to specific ALS-related complications.¹

What makes these numbers striking is the relationship between headache onset and the disease itself. Among patients with primary headaches, about a third experienced headaches that either first appeared or clearly worsened after their ALS diagnosis. Fourteen patients saw existing headaches get worse, and seven developed headaches for the first time after ALS onset. The remaining patients had a headache history that predated their diagnosis.¹ So while ALS is not a headache disorder in the traditional sense, it clearly creates the conditions for headaches to develop or intensify.

Breathing Problems As a Headache Trigger

The most well-understood headache mechanism in ALS involves the respiratory system. As the disease progresses, it weakens the muscles responsible for breathing, especially the diaphragm and the muscles between the ribs. When these muscles cannot move enough air, carbon dioxide builds up in the blood, a state called hypercapnia. Elevated carbon dioxide dilates blood vessels in the brain, which triggers headache. These headaches tend to be worst in the morning because breathing is naturally shallower during sleep, so carbon dioxide accumulates overnight.

The connection between ALS and breathing trouble at night is substantial. A study measuring overnight breathing in ALS patients found that 40% showed nocturnal hypoventilation, meaning their breathing was too shallow during sleep. Roughly 46% also had significant sleep-disordered breathing.² Among the 100 ALS patients in the headache study, 12 of the 15 with secondary headaches had headaches attributed to this kind of oxygen deprivation and carbon dioxide buildup. Those patients reported improvement when they started using assisted ventilation.¹

If you or someone you care for with ALS starts waking up with headaches, especially headaches that ease as the day goes on, that pattern is a red flag for respiratory insufficiency and deserves prompt evaluation by the care team. It can be one of the earliest signs that breathing support is needed, even before other respiratory symptoms become obvious.

How Non-Invasive Ventilation Helps

Non-invasive ventilation, commonly delivered through a BiPAP machine, is the primary treatment for respiratory-related headaches in ALS. The device delivers pressurized air through a mask, assisting the weakened breathing muscles and preventing the overnight carbon dioxide buildup responsible for morning headaches.

A study tracking ALS patients after they started non-invasive ventilation found significant improvements across several related symptoms within the first three months. Sleep quality scores improved, daytime sleepiness dropped, and overall hypercapnia-associated symptoms declined. These benefits held for patients with both bulbar-onset and spinal-onset ALS, and the positive effects were long-lasting rather than temporary.³

The practical takeaway is that morning headaches in ALS should not simply be treated with pain relievers and left at that. If the underlying cause is insufficient breathing during sleep, the headache is a symptom that points toward a treatable problem. Ventilatory support addresses the root cause, and the headache relief tends to follow naturally.

Neck Weakness, Dropped Head, and Cervicogenic Headache

Another pathway to headaches in ALS has nothing to do with oxygen levels and everything to do with the muscles of the neck. ALS frequently weakens the neck extensors, the muscles running along the back of the neck that hold your head upright. When those muscles lose strength, a condition called “dropped head syndrome” can develop, where the chin falls toward the chest and holding the head up becomes effortful or impossible.

Dropped head syndrome has been documented in ALS across decades of clinical observation. A review covering a 20-year period described nine ALS patients who developed the condition, noting that it can appear early or late in the disease course.⁴ The constant strain on the remaining neck muscles and the altered head position produce tension and pain radiating from the neck into the back of the skull. This type of headache, sometimes called cervicogenic headache, feels different from a migraine. It usually presents as a steady ache at the base of the skull, worsens with head position, and can be accompanied by stiffness and soreness in the neck itself.

A survey of ALS patients found that 79% reported neck weakness and 38% reported neck pain.⁵ Given how frequently neck weakness occurs, it is a plausible contributor to the high rate of tension-type headaches seen in ALS patients. The headache literature tends to focus on classic triggers like stress and poor sleep, but in ALS the physical mechanics of holding your head upright with weakening muscles are probably doing much of the work.

What Cervical Collars Can and Cannot Do

Cervical collars are the most commonly recommended physical support for ALS patients dealing with neck weakness and dropped head. In principle, a well-fitted collar redistributes the weight of the head, takes strain off the weakened neck muscles, and can reduce the chronic tension that contributes to headaches. In practice, the experience is mixed.

Among ALS patients who had tried cervical collars, many had experimented with more than one type. The average satisfaction rating was only about 5 out of 10.⁵ Common complaints include discomfort, difficulty swallowing while wearing the collar (a serious concern for ALS patients who already have swallowing difficulties), restricted breathing, and the collar not providing enough support as weakness progresses. The ideal collar is rigid enough to hold the head but not so bulky that it interferes with eating, speaking, or using respiratory equipment.

Wheelchair headrests, custom-molded supports, and high-back seating can supplement or replace a collar for patients who spend much of their time in a chair. Occupational therapists specializing in ALS care are generally the best resource for navigating these options, because what works well changes as the disease progresses, and a solution that fits at one stage may become inadequate or uncomfortable within months.

Medication-Related Headaches

ALS treatments themselves can cause headaches. Three of the 100 patients in the headache prevalence study developed headaches after starting riluzole, one of the primary drugs used to slow ALS progression.¹ Riluzole-associated headache is generally mild and tends to occur early in treatment, though it can persist.

A newer medication, tofersen, which targets a specific genetic form of ALS involving the SOD1 gene, carries a stronger headache signal. Tofersen is delivered by lumbar puncture, an injection into the spinal fluid, and headache is a well-documented side effect of that delivery method. An analysis of adverse event reports found that headache was among the notable adverse reactions associated with tofersen, alongside post-lumbar-puncture syndrome, which itself features headache as its primary symptom.⁶ For patients on tofersen, headaches in the days following an injection are relatively expected and usually managed with rest, hydration, and standard pain relief. Persistent or severe headaches after a lumbar puncture should be evaluated, however, because they can sometimes indicate a spinal fluid leak that needs specific treatment.

Edaravone, the other approved ALS drug, did not show a comparable headache signal in the same analysis, so patients and clinicians working through treatment options can factor this in. Headache from medication is generally the most straightforward variety to address, because the timing relative to drug administration makes the cause clear, and the management is well established.

Autonomic Instability and Less Obvious Contributors

ALS can disrupt the autonomic nervous system, which controls involuntary functions like heart rate and blood pressure. Research on ventilator-dependent ALS patients found marked fluctuations in blood pressure, including episodes of sudden drops without the expected compensatory heart rate increase, alongside persistent elevated levels of norepinephrine, a stress hormone indicating chronic sympathetic nervous system overactivity.⁷ Blood pressure swings and sympathetic overdrive are both recognized headache triggers in non-ALS populations, and there is reason to suspect they contribute to headaches in advanced ALS as well, though this specific connection has not been thoroughly studied.

Other indirect contributors include dehydration and poor nutrition. Swallowing difficulties are common in ALS and can lead to reduced fluid intake, which is a well-known headache trigger in anyone. Fatigue, poor sleep quality from respiratory issues or discomfort, and the psychological burden of a progressive neurological disease all compound the picture. Stress and depression, both prevalent in ALS, are independently linked to increased headache frequency. The result is that many ALS patients are exposed to multiple headache triggers simultaneously, making it difficult to isolate a single cause.

Telling Headache Types Apart

Because different causes require different responses, it helps to pay attention to headache patterns. Broadly, headaches in ALS fall into a few recognizable categories.

Morning headaches: Typically dull and diffuse, present upon waking, easing within an hour or two. These strongly suggest nocturnal hypoventilation and carbon dioxide buildup. The appropriate response is respiratory assessment, not just aspirin.
Base-of-skull ache: A steady pain at the back of the head, worsening with certain head positions, often accompanied by neck stiffness. This pattern points toward neck muscle weakness and cervicogenic origins. Positioning support and physical therapy are the first-line approaches.
Post-injection headaches: Occurring within hours to days after a lumbar puncture for tofersen administration. Usually positional, worse when sitting or standing, better when lying flat. Hydration, rest, and lying down typically help. Headaches that persist beyond a few days or are unusually severe need medical follow-up.
Medication-onset headaches: Appearing shortly after starting or adjusting riluzole or other drugs. These are generally mild and may resolve as the body adjusts, but should be reported to the prescribing physician.
Migraine-pattern headaches: Pulsating, often one-sided, possibly with light sensitivity or nausea. Some ALS patients had migraines before their diagnosis, while others develop them afterward. Standard migraine approaches apply, though drug interactions with ALS medications need consideration.

Keeping a simple log of when headaches occur, how they feel, and what seems to make them better or worse gives the care team much more to work with than a general report of “I’ve been getting headaches.” The distinction between a morning headache suggesting ventilatory failure and a neck-tension headache suggesting the need for better head support can genuinely change the treatment plan.

Practical Management Strategies

Managing headaches in ALS almost always means managing the underlying cause rather than relying on pain medication alone. For respiratory headaches, starting or optimizing non-invasive ventilation is the most effective intervention. For neck-related headaches, appropriate head and neck support through collars, wheelchair modifications, or positioning pillows comes first. For medication side effects, adjusting the dose or timing of the drug, or switching agents when alternatives exist, is the standard approach.

That said, pain relief still has a role. Over-the-counter options like acetaminophen are commonly used for mild headaches, while prescription options may be appropriate for more severe or persistent headaches. The challenge in ALS is that some common headache medications interact poorly with respiratory weakness. NSAIDs like ibuprofen can affect kidney function in patients who are already dehydrated from swallowing difficulties. Opioids, which might be considered for severe pain, suppress the respiratory drive, a serious risk in a disease that already compromises breathing. These tradeoffs make it especially important that headache management in ALS is coordinated with the broader care team rather than handled informally.

Non-drug approaches should not be overlooked. Adequate hydration, even when swallowing is difficult (thickened fluids or alternative hydration methods can help), good sleep hygiene, and careful positioning during rest and sleep all reduce headache burden. For patients with neck involvement, something as simple as adjusting the height of a computer screen or the angle of a reading stand can reduce the muscular strain that drives tension headaches throughout the day.

Why Headaches in ALS Are Worth Taking Seriously

There is a tendency, both among patients and sometimes among clinicians, to treat headaches in ALS as a minor complaint compared to the disease’s larger trajectory. That framing misses something important. Morning headaches from hypoventilation are not just uncomfortable; they are a clinical indicator that breathing support may be needed. In the headache study, the patients whose headaches were caused by respiratory insufficiency saw improvement when they started assisted ventilation.¹ Catching that signal early can mean getting on ventilatory support sooner, which has its own quality-of-life and potentially survival implications.

Neck pain and headaches from dropped head syndrome are also worth addressing aggressively rather than accepting as inevitable. Chronic pain and headache are associated with poorer sleep, worse mood, and reduced participation in daily activities, all of which compound the already considerable challenges of living with ALS. Even the moderate satisfaction rating for cervical collars suggests that some benefit is being achieved, and newer custom-fabricated solutions continue to evolve.

Headaches That Predate ALS

A detail that sometimes gets lost is that many ALS patients had headaches before their diagnosis. In the study of 100 ALS patients, 42 of the 62 with primary headaches already had a headache history that predated their ALS.¹ For these patients, ALS may not be creating new headaches so much as changing the character or frequency of headaches they were already prone to. Stress, disrupted sleep, reduced physical activity, and neck weakness can all take an existing headache tendency and amplify it.

This matters practically because someone with a long migraine history who then develops ALS should not assume every headache is now “an ALS headache.” Their migraines may still respond to whatever worked before, even as new headache types emerge from ALS-specific causes. Conversely, a person who never had headaches and starts getting morning headaches after ALS diagnosis should not dismiss them as ordinary tension headaches. The pattern of new headaches in the setting of a neuromuscular disease is clinically meaningful and should prompt evaluation of respiratory function, neck strength, and medication effects. The overlap between pre-existing headache conditions and ALS-specific headache triggers is one more reason why a careful headache history matters so much in this population.

1
PubMed Central. Headache types and characteristics in patients with Amyotrophic Lateral Sclerosis
2
BMJ Journals. Prevalence of sleep apnoea and capnographic detection of nocturnal hypoventilation in amyotrophic lateral sclerosis
3
PubMed. Non-invasive ventilation and hypercapnia-associated symptoms in amyotrophic lateral sclerosis
4
Journal of Neurology, Neurosurgery & Psychiatry. Early or late appearance of “dropped head syndrome” in amyotrophic lateral sclerosis
5
PubMed. Cervical Collar Satisfaction and Functional Impact in Amyotrophic Lateral Sclerosis: A Survey Study
6
PubMed Central. Comparative safety analysis of Riluzole, Edaravone and Tofersen in ALS management: insights from FAERS database
7
Journal of the Neurological Sciences. Circulatory collapse and sudden death in respirator-dependent amyotrophic lateral sclerosis