What is Cyclic Vomiting Syndrome (CVS)

What is Cyclic Vomiting Syndrome (CVS)

CVS is classified as severe vomiting lasting from 3 hours and up to 3 days with no apparent cause.

  • It most commonly starts at the same time of day and lasts the same amount of time.

  • It is most common in children 0-3 years old, with sufferers growing out of it by 7-14 years old. Yet, in some cases, it continues into adulthood

The sad fact about CVS is that it is often not diagnosed for up 2.5 years in children and up to 9 years in adults.  This is due to its complexity of presenting symptoms and misdiagnosis of gastrointestinal issues or abdominal migraine. It crazily has led to most patients having avoidable medical procedures before getting a proper diagnosis.  It’s even recorded that up to 27-50% of CVS sufferers will become migraineurs into adult life. 

CVS has a huge impact on quality of life, with increased anxiety and depression, as nausea and vomiting are so debilitating.  It is linked to poor psychosocial function and increases in irritable bowel syndrome.  

Nausea and vomiting is the cause of 38% of all missed workdays, leisure days, and household activity days.  Children are also reported to miss up to 19-24 days of school or childcare. Even scarier than watching your poor children suffer is to learn that 50% of children need IV intervention and hospital admission and 27% of them need this every episode.

So, how can The Headache Clinic help? 

We have known for many years that the upper cervical spine has been involved in causing nausea and vomiting.  Furthermore, recent research has explained a common underlying condition, which is sensitivity in the brainstem.  This is the same for migraine, cervicogenic headache, tension-type headache, and menstrual migraines.  The brainstem receives information from two inputs only – the upper cervical area, including the upper 3 joints, one disc with the surrounding muscles, and the trigeminal area of the brain. The brainstem sits at the bottom of the brain, connecting it to the spinal cord, and is nestled in the canal of the upper cervical spine. 

So, you can just imagine how much of a direct input the upper cervical has into the brainstem itself.  So, back to the sensitivity.  This sensitivity in the brainstem reduces our tolerance to normal events, such as poor sleep, stress, dehydration, bright lights, poor head postures, hormonal fluctuation, and foods such as cheese, wine, chocolate, and other additives.  Other triggers of CVS can be viral infections and emotional events that include panic attacks, anxiety, and even social events such as parties which are supposed to be fun….sigh!

I bet you are asking, how do children have all this sensitivity at such a young age?  They are just starting out.  They usually haven’t been subjected to large amounts of stress, binging on alcohol, or significant hormonal fluctuations. 

However, they do have a heavy head and weak un-developed deep neck stabilising muscles.  These get stronger with age, and this may explain just how they grow out of it.  It may also explain why some continue to have symptoms into adolescence or adult life.  Especially if they have had a head knock, concussion, or neck injury, which is not uncommon in children as they play, learn and grow.

This may be the reason so many of these children become migraineurs, as this sensitivity remains in silence until the threshold is exceeded and migraine results.  That is unless it is addressed and the dysfunction in the upper cervical spine is corrected.  

It may be surprising to know that the treatment of CVS is similar to migraine treatment with the use of amitriptyline, a tricyclic antidepressant that works in the brainstem by blocking receptors and anti-nausea drugs.  These are being given to children at such a young age which is alarming when considering the long-term effects of medication.

Experience relief from cyclic vomiting syndrome (CVS)

The key is to find out why you or your child have sensitivity in the brainstem.   At The Headache Clinic, we frequently treat those with CVS, abdominal migraine, and nausea, vomiting symptoms.

Our practitioners all come from either a physiotherapist or chiropractic background who have undergone special training to diagnose and effectively treat the upper cervical spine and reduce the sensitivity with great success.  If any of this resonates with you or your child and you would like to have a chat with one of our practitioners, please feel free to give us a call and request a free 15-minute consult.  We are here to help.

Jaw pain can affect far more than your jaw.

For many people, it shows up as a dull ache through the face, tightness around the temples, headaches, clicking when chewing, or a jaw that feels stiff or difficult to open. It may also come with teeth grinding at night, tension through the neck, or the sense that your jaw simply does not move the way it should.

These symptoms are often linked to TMD, also known as temporomandibular disorder. Many people call it “TMJ”, but that is actually the name of the joint itself. The temporomandibular joint, or TMJ, is the joint that connects your jaw to your skull. When that joint, and the muscles and nerves around it, are not functioning well, it can lead to ongoing pain and dysfunction.

At The Headache Clinic, we are experts in complex conditions involving the head, neck and jaw. That means we look deeper than the obvious symptom. If your jaw is painful, tight, clicking, locking, or contributing to headaches, we focus on finding the true driver of the problem and treating it with precision.

What is TMD?


Temporomandibular disorder (TMD) is a condition affecting the jaw joint and the muscles that control jaw movement. It can cause pain, stiffness, restricted movement, and a range of symptoms through the face, head and neck.

Because the jaw is used constantly for talking, chewing, swallowing and yawning, even mild dysfunction can become highly disruptive. For some people, symptoms come and go. For others, they become persistent and start to affect sleep, eating, concentration and quality of life.

Common symptoms of TMD:


TMD can present in different ways, but common symptoms include:

- Jaw pain or tenderness, often around the joint or muscles
- Clicking, popping, or grinding sounds with jaw movement
- Difficulty opening the mouth fully or reduced range
- Jaw locking, catching, or stiffness
- Pain when chewing, talking, or prolonged mouth use
- Facial pain or a sense of pressure
- Headaches, particularly through the temples
- Clenching or grinding of the teeth, especially at night
- Neck pain and increased muscular tension
- Pain around the ear or a feeling of tightness through the side of the face


In many cases, people do not initially realise their headaches or facial pain could be coming from the jaw.

Why does TMD happen?


TMD rarely has one single cause. More often, it develops because several factors combine over time and place ongoing strain on the jaw joint and surrounding muscles.

Common contributors include:

- Stress and tension
- Teeth clenching or grinding, also called bruxism
- Excessive gum chewing
- Previous jaw injury
- Joint irritation or arthritic change
- Muscle tension through the jaw, face and neck
- Poor coordination between the jaw and upper neck

This is why generic advice does not always work. A mouthguard may help protect the teeth. Resting the jaw may ease symptoms briefly. But if the underlying dysfunction is still there, the pain often returns.

Why jaw problems often trigger headaches


The jaw, head and upper neck are closely connected. When the jaw is not moving properly, the surrounding muscles often become tense and overworked. This can refer pain into the temples, cheeks, behind the eyes and into the head.

For some people, this creates a repeating cycle. The jaw becomes tight, headaches become more frequent, the neck stiffens, and clenching increases, especially during sleep or times of stress.

That is why effective treatment needs to look beyond the jaw alone.

Why TMD is often missed or poorly treated


TMD is common, yet it is often not treated in a truly specialised way.

Many people are told to avoid chewy foods, wear a splint, or do a few basic exercises. While those strategies can sometimes help, they may not resolve the deeper issue if the real problem involves joint restriction, muscle dysfunction, neural irritation, or an associated neck problem.

This is where a more skilled and targeted approach can make all the difference.

At The Headache Clinic, treating jaw disorders is not an afterthought. It is part of our niche with complex head, neck and facial conditions.

Our approach to TMJ and TMD treatment


We provide a expert hands-on physiotherapy approach for people experiencing jaw pain, clenching, grinding, restricted movement and jaw-related headaches.

Your treatment is tailored to the structures actually involved in your symptoms. Depending on your presentation, this may include:

- Targeted treatment to the jaw joint
- Hands-on therapy for the surrounding muscles
- Treatment of associated neck dysfunction
- Careful work around facial and neural tension
- Restoring normal jaw movement and control
- Reducing the cycle of stiffness, overactivity and clenching
- Our aim is not simply to help you cope.

Our goal is to improve how the jaw and surrounding system function, so you can get lasting relief and return to eating, speaking and moving comfortably.

Is clenching and grinding a sign of TMD?


It can be.

Clenching and grinding often place significant load on the jaw joint and the muscles around it. Over time, this can lead to soreness, restricted movement, facial tension, worn teeth and headaches, especially on waking.

For some people, clenching is the main driver. For others, it is part of a broader pattern involving the jaw, neck and nervous system. Either way, it is worth assessing properly rather than simply assuming a night guard will solve it.

When should you seek treatment for jaw pain?

ou should consider an assessment if you have:

- Persistent jaw pain or tightness
- Clicking or locking of the jaw
- Difficulty opening your mouth fully
- Pain when chewing
- Frequent headaches with facial or temple tension
- Teeth grinding or clenching at night
- Ongoing symptoms that are not improving

You do not need to wait until symptoms become severe. Early treatment can often prevent the problem becoming more entrenched.

Why patients choose The Headache Clinic


People come to us because they want more than temporary relief.

They want a clear explanation of what is going on, a clinician who understands the connection between the jaw, head and neck, and a treatment plan that is specific to them.

At The Headache Clinic, we combine clinical expertise with a careful, hands-on approach that is designed to uncover and address the true cause of your symptoms. For patients with TMD, that often means finally feeling understood after months or even years of frustration.

Book a TMJ assessment

If you are dealing with jaw pain, clicking, clenching, grinding, headaches or restricted jaw movement, we are here to help.

Book your assessment today and take the first step towards a more comfortable jaw, fewer headaches, and relief that lasts.

What is Cyclic Vomiting Syndrome (CVS)

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