Dental Erosion From Acid Reflux: The Signs, and How We Rebuild Worn Teeth

Here's something that surprises a lot of people: your teeth can wear away without a single fizzy drink or sweet in sight. Sometimes the culprit is acid rising up from your own stomach, quietly thinning the enamel while you sleep, and by the time you notice, the damage has been going on for years.

We meet people all the time who feel a bit blindsided by this. So let's talk it through gently and clearly, because once you understand what's happening you can protect what you've got, and rebuild what's already worn.

What Dental Erosion Actually Is

Erosion is enamel dissolving away in acid. That's the whole thing. Enamel is the hard, glassy shell on the outside of your teeth, and it's the toughest stuff your body makes, but it has one weakness: acid softens it and washes it away, a little at a time.

Picture a bar of soap left sitting in a puddle at the edge of the sink. Each time water runs over it, a whisper-thin layer melts off, and for a while you'd swear nothing's changed. Then one day you pick it up and it's half the size. Enamel goes the same way in acid, thinning so slowly that your eyes never catch it happening. And here's the part that matters most: enamel doesn't grow back. Once it's gone, it's gone for good, which is exactly why catching erosion early is such a gift to your future self.

Stomach Acid Versus Food Acid: Why One Is Sneakier

Most people think of tooth-damaging acid as the stuff in cola and orange juice, and that's fair, because those do wear teeth down too. But dietary acid at least announces itself. You taste it, you feel it, you know you've had it.

Stomach acid is a different animal, and it's far sneakier for two reasons. First, it's strong: the acid your stomach uses to break down food is a great deal harsher than anything in your fridge. Second, it turns up when you're not looking. Reflux often happens at night, lying flat, when there's less saliva around to rinse it away and wash the acid off your teeth. So the acid sits, quietly, hour after hour, doing its work on the backs of your teeth where you'd never think to look. That's why erosion from the inside so often goes unnoticed until it's well underway.

The Causes Cluster: Where the Acid Comes From

Erosion from stomach acid nearly always traces back to one of a few sources, and none of them are anything to feel ashamed about. They're common, they're human, and they're all worth knowing.

Acid reflux and GERD. This is the big one. Reflux is when acid escapes back up out of your stomach, and when it happens often it has a proper name, gastro-oesophageal reflux disease, or GERD. You might know it as heartburn, or that sour taste at the back of the throat, though plenty of people have "silent" reflux with barely any symptoms at all. If any of that rings a bell, it's genuinely worth seeing your doctor, because treating the reflux itself is what stops the acid at its source, and that protects your teeth better than anything a dentist can do.

Being sick a lot. Vomiting brings stomach acid straight across your teeth, so anything that causes it repeatedly can wear enamel over time. Pregnancy is a common and gentle example: morning sickness, especially in those early months, means more acid reaching the teeth than usual, which is one small reason a check-up is a kind thing to do for yourself while you're expecting. Tummy bugs that drag on can do it too.

There's another cause here that deserves care and zero judgement, and that's eating disorders such as bulimia, where repeated vomiting can wear the enamel noticeably. If that's part of your life, please know your dentist has seen it before and is only ever on your side, and the most important step by a mile is support for the wider picture, not the teeth. In the UK, Beat run a free, confidential helpline, and your GP is a safe first door to knock on. We're always here for the dental side whenever you're ready, no questions that make you uncomfortable.

Fizzy and citrus habits on top. Diet and stomach acid often team up. If you're already dealing with reflux and you're also sipping sparkling water, cola or citrus through the day, the two together thin enamel faster than either would alone. It's worth being aware of, because the diet side is one part that's easy to ease off.

The Signs to Watch For

Erosion is quiet, but it does leave clues, and once you know them you'll spot them in the mirror.

The first is usually sensitivity. As enamel thins, the layer beneath it sits closer to the surface, so cold air, ice cream and hot tea start to give you that sharp little zing. This overlaps a lot with everyday sensitivity from other causes, so it's worth reading our guide to sensitive teeth and what actually helps alongside this, because the fixes differ depending on why it's happening.

Then there's the look of the teeth themselves. Enamel is slightly opaque, a bit like frosted glass, so as it wears the edges of your front teeth can turn translucent, almost see-through at the very tips. Those edges can start to look thin and glassy, and sometimes chip more easily than they used to. On the biting surfaces of your back teeth you might notice cupping, little shallow dents scooped into the tops where the enamel has dished out.

And there's the colour. Under the enamel sits dentine, which is naturally more yellow. So as the white outer shell thins, more of that yellow shows through, and teeth can look duller or more yellow even though you're brushing just as well as ever. If your teeth seem to be yellowing for no reason you can put your finger on, thinning enamel is one thing worth ruling out, and it's worth telling apart from a white spot on a tooth, which comes from enamel losing minerals in one patch rather than thinning all over.

What to Do: Protect First, Then Repair

Here's the order that matters, because getting it the wrong way round is a genuinely common mistake.

Protect what you've still got, first. The single biggest one: don't brush straight after acid. When enamel has just been softened by reflux or a sicky moment, it's temporarily vulnerable, and scrubbing it right then can brush away the very layer you're trying to keep. Instead, rinse your mouth with plain water, or a little water with a pinch of bicarbonate of soda, to wash the acid off and let your saliva firm the enamel back up. Then brush maybe half an hour to an hour later. And crucially, treat the cause: if reflux is behind it, seeing your doctor to get that under control is the thing that actually turns off the tap. We can shore up your teeth all day long, but if acid keeps arriving, we're bailing out a boat with the plug still pulled.

Then rebuild what's worn. This is the part we love, because it's where worn, tired-looking teeth get their shape and confidence back. For edges that have thinned and shortened, composite bonding is often the perfect answer. We add a tooth-coloured resin straight onto the worn edge and sculpt it back to its natural length, all in a single visit with no drilling of healthy tooth, and it starts from £199 per tooth. If a front tooth has chipped along a thinned edge, the same approach handles that beautifully, and we go through it in our guide to chipped tooth repair.

For more extensive wear, where several teeth have lost a lot of their surface, porcelain veneers come into their own. A veneer is a thin, custom shell of porcelain bonded over the front of the tooth, and it rebuilds the shape while shrugging off stains and everyday wear for many years. They start from £695 per tooth at UrgentCare Dental. And if a tooth has worn or broken down so far that it needs wrapping all the way round for strength, that's when we'd talk about a dental crown instead, which is really a last line rather than a first choice for erosion caught in time.

Which brings us to the whole point of catching it early. The sooner erosion is spotted, the smaller and cheaper the fix, because bonding a worn edge is a world away from crowning a tooth that's worn down to a stub. That's exactly what our £20 emergency and assessment appointment is for. It includes X-rays and a proper look at your enamel, and we'll tell you honestly whether you're catching this nice and early or whether there's real work to do. Either way, you'll walk out knowing precisely where you stand, and that peace of mind alone tends to be worth the twenty quid.

Your Questions, Answered Straight

Can being sick actually damage your teeth?

Yes, it genuinely can, though usually only when it happens often rather than the odd upset stomach. Vomiting washes strong stomach acid across your teeth, and repeated exposure thins the enamel over time. The best thing you can do straight after is rinse with water and hold off on brushing for a while, so you're not scrubbing softened enamel. If sickness is a regular part of life for any reason, a friendly check-up lets us keep an eye on things before any wear goes far.

Does pregnancy affect your teeth?

It can, and morning sickness is one of the main reasons. More acid reaching the teeth in those early months can start to wear enamel, so rinsing with water after being sick and leaving a gap before brushing both help a lot. A gentle check-up while you're expecting is a lovely bit of self-care, and there's nothing about it that isn't safe or reassuring.

Is enamel erosion reversible?

The lost enamel itself, sadly, doesn't grow back, which is why protecting what you have matters so much. The good news is that the look and function of worn teeth is very fixable: composite bonding from £199 a tooth rebuilds thinned edges, and veneers handle heavier wear. So while we can't regrow the enamel, we can absolutely give you back the smile.

How do I know if it's erosion or just sensitive teeth?

Honestly, the two overlap a great deal, and the only sure way to tell is to have someone look. Erosion tends to come with visible clues too, like translucent, thinning edges or a more yellow colour creeping in, whereas plain sensitivity often doesn't change how the teeth look. Our sensitive teeth guide helps you tell them apart, and a quick assessment settles it for certain.

The Short Version

Dental erosion from acid reflux, sickness or pregnancy is common, quiet, and very fixable once you know what you're looking at. Stomach acid thins enamel slowly and out of sight, so the signs to watch are sensitivity, translucent edges, cupped back teeth and a creeping yellowness, and the golden rule is to rinse rather than brush straight after acid and to treat the cause with your doctor.

From there, the repair is genuinely good news: worn edges rebuilt with bonding from £199, bigger cases restored with veneers, and a £20 assessment to catch it all before it grows. If any of this sounds like your teeth, come and let us take a proper look, and we'll tell you exactly where you stand and what, if anything, needs doing.