Tongue vs bar relief and how to understand what your horse really needs
When it comes to choosing the right bit for your horse, one of the most important – and often misunderstood – consideration is where the pressure is being applied in the mouth. You may have heard riders or bit fitting experts talk about tongue relief or bar pressure, but what do these terms actually mean? And how can you tell which one your horse prefers or dislikes?
Getting it right can make a noticeable difference to your horse’s comfort, way of going and overall acceptance of the contact. That’s why in this blog we’re taking a closer look at the difference between tongue and bar relief, the signs to look out for and how to start narrowing down the best option for your horse.
What do we mean by tongue and bar relief?
A bit doesn’t just sit passively in the horse’s mouth, it applies pressure to several areas in the horse’s mouth and, depending on the design, on the chin groove, nose or poll. Inside the mouth, pressure is primarily applied to the tongue and the bars.
The tongue is soft, fleshy and takes up a significant amount of space in the mouth, particularly in horses with thicker tongues or smaller oral cavities. The bars, on the other hand, are the toothless sections of the lower jaw. They’re covered by a relatively thin layer of tissue and can be surprisingly sensitive to direct pressure.
Different mouthpiece shapes change how pressure is distributed between these areas. Some designs create space for the tongue, while others spread pressure more evenly across it to reduce the impact on the bars.
In simple terms, that means tongue relief bits reduce pressure on the tongue by creating space, and bar relief designs reduce pressure on the bars by distributing pressure more broadly across the tongue. Most bits will apply pressure to both areas to some degree, but it’s the balance between the two that makes the difference. So how can you figure out which is right for your horse?
Signs your horse may prefer tongue relief
Some horses find tongue pressure uncomfortable, particularly if they have a large or fleshy tongue or limited room in the mouth. When the tongue feels compressed, the horse will often try to create space in any way they can.
This can show itself in a number of ways. For example, you might notice your horse becoming unsettled in the contact, constantly moving the bit around in their mouth or opening their mouth to avoid the pressure. In some cases, they may even try to put their tongue over the bit or push it out to the side.
The most common signs to look out for include:
● The tongue coming over the bit or protruding
● A busy or unsettled mouth
● Opening the mouth or resisting the contact
● Head shaking or tilting
● Dropping behind the contact or avoiding it altogether
These behaviours are often mistaken for disobedience or tension, but they might just be the horse trying to relieve pressure on their tongue.
Signs your horse may prefer bar relief
In contrast, some horses are far more sensitive to pressure on the bars. Because this area is less cushioned than the tongue, pressure can feel quite sharp and direct, particularly with certain mouthpiece designs. These horses often don’t back away from the contact in the same way they might if they dislike tongue pressure. Instead, they can become reactive or defensive, particularly when rein pressure is applied.
You may notice:
● A sharp toss of the head upwards when the reins are taken up
● An overreaction to even very light contact
● Hollowing, or going behind the vertical or above the bit
● Rushing forward or trying to run through the hand
● An inconsistent contact that feels on/off rather than steady
In these cases, the horse isn’t necessarily objecting to contact itself, but to how and where that pressure is being applied.
How to start assessing your horse
As with all aspects of bitting, this is rarely black and white, but there are some useful starting points. Begin with your horse’s mouth conformation. A large, fleshy tongue that fills the mouth will often mean there’s less space available, making tongue pressure more of a concern. And horses with particularly sharp or narrow bars may be more sensitive to direct pressure in that area.
Then look at how your horse goes in the contact. A horse that feels busy, evasive or reluctant to take a consistent contact may be telling you something very different from one that feels sharp, reactive or inconsistent. Think of it a bit like building up a picture rather than relying on one single sign.
Bit shapes and how they influence pressure
Different mouthpieces will shift pressure between the tongue and bars in subtle but important ways. For horses that may benefit from tongue relief, you’re generally looking at designs that create space or reduce compression. This might include ported mouthpieces, anatomically shaped bits or curved designs that follow the natural shape of the mouth more closely.
For horses that need more bar relief, the aim is usually to soften and distribute pressure. Mullen mouthpieces, for example, offer a more even feel across the tongue and bars, while double-jointed bits can reduce focal pressure and create a more consistent contact. As always, small differences in shape can have a noticeable impact on how the bit feels to the horse.
A note on balance
It’s important to remember that with bitting choices, you’re rarely removing pressure altogether, you’re redistributing it. For example, increasing tongue relief by adding a port will often shift more pressure onto the bars. Likewise, a thicker or softer mouthpiece may feel kinder on the bars but take up more room in the mouth, increasing tongue pressure. That’s why finding the right bit is about balance. It’s about understanding where your horse is most comfortable and making adjustments that suit them as an individual.
Taking a practical approach
If you’re not sure where to start, the best approach is to make small changes and see how your horse responds. Then, you can focus on the details, such as:
● Are they more willing to take the contact forward?
● Does the contact feel more consistent in your hand?
● Are they softer through the jaw and neck?
● Do they feel more relaxed overall?
These small improvements are often the clearest signs that you’re moving in the right direction.
We’re here to help
Understanding tongue versus bar relief is a useful step towards finding the right bit, but every horse is different and sometimes a small tweak in design can make all the difference.
If you’re not quite sure what your horse is telling you, or you’d like to explore some options, our team is always happy to help. Jodie offers friendly, practical advice and can often suggest a bit that bridges the gap between two needs.