Under saddle
Why does my horse toss its head?
Equiteca Editorial · Reviewed 2026-08-30 · 4 sources
Head tossing covers everything from a horse rooting against the contact to a violent, uncontrollable flick of the nose that makes the horse dangerous to ride. It is almost never bad manners. The head is where bit, teeth, bridle, and the trigeminal nerve all meet, so a tossing head is usually a horse trying to escape something physical. Dental pain and bit pressure are common and fixable causes. A smaller number of horses have trigeminal-mediated headshaking, a genuine nerve-pain condition that affects around 1 percent of horses severely enough to need veterinary help. Rule out mouth, bit, and nerve causes before you touch the training.
What it looks like
- Flicks or jerks the nose up and down, often vertically, especially at faster gaits
- Tosses against the bit, roots the reins, or gets worse as the contact is taken up
- Rubs the muzzle, snorts, or strikes at the face, sometimes in sunlight or wind
- Tilts the head, chomps the bit, or drops feed when eating
- Worse when ridden than in the field, or worse in a particular bit or bridle
- Head tossing is new, or has become more violent or more constant
Likely causes, ranked
A tag marks the causes that are pain wearing a behavior label. Those are the ones to rule out first.
Sharp enamel points, hooks, or a bit sitting over a wolf tooth make contact genuinely painful. The University of Florida extension lists head tossing and resistance to the bit among the signs of dental problems, and recommends yearly dental exams. A horse whose mouth hurts when the rider takes a contact answers by throwing its head to escape the pressure.
A bit that is the wrong size or action, a noseband done up too tight, or a browband or bridle that pinches all cause the horse to toss its head to get relief. This is one of the most common and most fixable causes, and it often resolves as soon as the tack is changed and fitted properly.
A distinct nerve-pain condition where the trigeminal nerve of the face fires abnormally, producing sudden, vertical, uncontrollable flicking, nose rubbing, snorting, and striking at the muzzle. UC Davis notes it affects around 1 percent of horses severely enough to need veterinary attention, is often worse in bright light, wind, or exercise, and needs veterinary diagnosis. This is not a training problem and cannot be schooled away.
A horse in back or hock pain often carries its head unevenly and tosses when asked to work through and take a contact. The American College of Veterinary Surgeons lists head tossing under saddle among the signs of kissing spines, so a tossing head is not always about the mouth. Pain further back can show up at the front end.
Flies around the face cause seasonal head tossing that a fly veil settles, and a green horse can toss its head evading a contact it does not yet understand. Both are real, but they are diagnosed once the mouth, the tack, and the nerve and back causes have been ruled out, not assumed first.
What to try
- 1Get the teeth and mouth checkedBook a dental exam and have the vet or dentist look for sharp points, hooks, and wolf teeth, and check how the bit sits. Dental and bit pain are the most common causes of head tossing and among the easiest to fix, so this is the place to start.
- 2Review the whole bridle and bitCheck the bit size and action, loosen an over-tight noseband, and look at the browband and headpiece for pinching. Try a simpler, kinder bit. A surprising amount of head tossing disappears once the tack stops hurting.
- 3Note the pattern for the vetRecord when the tossing happens: in sunlight, in wind, at speed, with the contact, or year-round. A vertical, violent flick with nose rubbing that is worse in bright light or wind points toward trigeminal-mediated headshaking and needs a vet, not more schooling. Clear notes speed up the diagnosis.
- 4Rule out pain further backIf the mouth and tack are clear, have the back and hindlimbs assessed, because head tossing under saddle can come from pain behind the saddle. Only once the body and the nerve causes are ruled out should flies or a contact evasion be treated as the answer.
When to call the vet
- The head tossing is new, violent, or getting worse
- The flick is sudden and vertical, with nose rubbing, snorting, or striking at the face
- It is clearly worse in bright light, wind, or during exercise
- The horse drops feed, resists the bit, or shows other signs of dental pain
- Tossing comes with signs of pain elsewhere, such as a sore back or poor performance
Not sure it is behavior or pain? How we frame it.
Behavior or pain?
A tossing head is easy to read as a horse arguing with the contact, so it gets met with a stronger bit or a tighter noseband, which is exactly the wrong move. The head is a crowded place: bit, teeth, bridle, and the trigeminal nerve all sit within inches of each other, and a horse that tosses is nearly always escaping something physical there. Dental and bit pain are the common, fixable causes. A smaller group has trigeminal-mediated headshaking, a real nerve-pain condition that no amount of training will fix and that needs a vet. The honest order is to rule out the mouth, the tack, and the nerve and back causes before flies or a green horse's contact evasion. Tightening the noseband on a horse in pain just traps it with what is hurting it.
Questions people ask
Is head tossing a training problem?
Rarely on its own. Head tossing is usually a physical problem at the front end: sharp teeth, a bit or bridle that pinches, or in some horses a nerve-pain condition called trigeminal-mediated headshaking. It can also come from back pain further behind the saddle. Rule those out with a vet and a dentist before treating it as a contact or obedience issue.
What is headshaking and is it different from ordinary head tossing?
Trigeminal-mediated headshaking is a specific nerve-pain condition, not ordinary evasion. The trigeminal nerve of the face fires abnormally, causing sudden, vertical, uncontrollable flicking, nose rubbing, snorting, and striking at the muzzle, often worse in bright light, wind, or exercise. It affects around 1 percent of horses severely enough to need veterinary help, and it needs a vet to diagnose and manage, not schooling.
Will a stronger bit or tighter noseband stop head tossing?
No, and it usually makes things worse. If the horse is tossing because the mouth or bit hurts, a stronger bit or a tighter noseband adds pressure to the exact place that is causing the problem. The fix is to find and remove the source of pain: check the teeth, refit the bit and bridle, and involve a vet if a nerve or back cause is possible.
Keep reading
Sources
Every figure on this page traces to one of these. We cite registries, associations, government and veterinary bodies, and published cost surveys - not other blogs.
- [1]Equine Dental Care- University of Florida IFAS ExtensiongovConfirms head tossing and resistance to the bit are signs of dental problems and sharp enamel points, and recommends regular dental exams and correct bit fit.
- [2]Trigeminal-mediated Headshaking- UC Davis Center for Equine HealthgovDescribes trigeminal-mediated headshaking as a nerve-pain condition affecting around 1 percent of horses severely, with vertical flicking, nose rubbing, and triggers of light, wind, and exercise, needing veterinary diagnosis.
- [3]Overriding/Impinging Dorsal Spinous Processes in Horses- American College of Veterinary SurgeonsassociationLists head tossing under saddle among the signs of kissing spines, showing head tossing can originate from back pain rather than the mouth.
- [4]The Ridden Horse Pain Ethogram- American Association of Equine PractitionersassociationSupports the behavior-versus-pain framing: ridden resistance behaviors are far more common in horses with musculoskeletal pain, so head tossing can be a pain signal.