Do you grind your teeth at night? Here is how to tell
Most people who grind their teeth have no idea they do it, because it happens while they are asleep. The signs show up somewhere else entirely: your jaw, your head, and your morning.
Grinding your teeth is one of the few dental problems you can have for years without ever catching yourself doing it.
It happens while you are asleep. There is no moment where you notice. So the signs turn up somewhere else entirely, and they rarely look like dental problems.
The signs, none of which are your teeth hurting
A headache first thing in the morning, usually dull, usually at the temples. This is the most common one, and it is very often blamed on sleep, screens or dehydration for years.
A jaw that feels tight or tired when you wake, sometimes with a click when you open wide.
Aching that spreads. The muscle that does the clenching runs up the side of your head and down into the neck, so grinding shows up as neck and shoulder tightness and sometimes as earache with nothing wrong in the ear.
Teeth that look different. Front teeth with flattened edges rather than the slight natural variation they had. Small chips. Back teeth that have lost the peaks on their chewing surfaces.
Sensitivity with no obvious cause, because enamel that has been worn thin lets hot and cold through more easily.
Somebody telling you. A partner who hears it is often the first to know.
The honest summary is that your dentist usually spots this before you do. The wear pattern is distinctive, and we see it against a record of what your teeth looked like last time.
Why it happens
Stress and anxiety are what people most often report, and many notice it gets worse in a hard stretch at work or after a bad year. It is a fair first place to look.
It is not the only one. Disturbed sleep and breathing problems during sleep are associated with grinding, which is why we ask about snoring and about how rested you feel in the morning. Caffeine, alcohol and smoking are all linked with it too. It also seems to run in families.
Being honest about the limits here: nobody can tell you with certainty why you specifically grind. What we can do is look at your teeth, ask about your sleep, and deal with what is actually happening.
What it costs if you leave it
Occasional clenching does very little. Sustained nightly grinding is different, and the damage accumulates quietly.
Enamel wears down, and enamel does not grow back. Teeth chip and crack. Existing fillings and crowns fail early because they are taking a load nobody designed them for. In severe long-term cases the teeth shorten enough to change the bite and the shape of the lower face.
That is the reason to act on a symptom that mostly just feels like a bad night's sleep. The headache goes away on its own. The wear does not.
What actually helps
A custom night splint. This is the mainstay, and it is worth being clear about what it does. It does not stop you grinding. The clenching is happening in your sleep and a piece of acrylic does not switch that off.
What it does is take the load. The wear happens to a splint that can be replaced instead of to enamel that cannot. Most people also find the morning headaches and jaw tightness ease, because the splint changes how the muscles load.
It is made from a scan or mould of your own teeth so it fits your bite. Do not substitute a sports mouthguard. That is a different appliance, made from a soft material for a single impact, and worn overnight it can encourage more clenching rather than less. Ours are covered on the teeth grinding page.
Rule out the sleep side. If you snore, wake unrefreshed, or your partner has noticed you stop breathing, that is worth investigating in its own right. Sometimes an appliance that helps with breathing during sleep helps the grinding as well. See snoring and sleep apnoea.
Treat the jaw joint if it is involved. Persistent clicking, locking or joint pain is a separate problem that sits alongside grinding. There is more on jaw and TMJ treatment.
Deal with the driver where you can. If stress is the cause, a splint protects your teeth but does not fix the reason. Exercise, sleep routine, cutting evening caffeine and alcohol, and getting help with the stress itself all belong in the plan. If it is severe, that is a conversation for your GP as well as us.
Repair what has already been lost. Mild wear may only need protecting from here. More advanced wear can be rebuilt with bonding, onlays or crowns to restore both the shape and the bite. That is a much larger piece of work than a splint, which is the whole argument for dealing with it early.
The bottom line
If you wake up with a sore jaw or a headache more than occasionally, mention it at your next appointment. It takes about a minute to check.
The reason to do it sooner rather than later is simple. A splint is a small, one-off piece of work. Rebuilding worn-down teeth is not.
Read more: Why a mouthguard is the cheapest dental work you will ever buy
Sleep and jaw FAQ
How do I know if I grind my teeth if I am asleep?
By the pattern rather than the act. Waking with a dull headache at the temples, a jaw that feels tight or tired in the morning, teeth that are sensitive without an obvious cause, and flattened or chipped edges. A partner may also hear it. Your dentist can often see the wear before you notice any of this.
Is grinding caused by stress?
Stress and anxiety are the most commonly reported driver, and many people notice it worsens in difficult periods. It is not the only factor. Disturbed sleep and breathing problems during sleep are associated with it, and so are caffeine, alcohol and smoking, which is why we ask about sleep as well as teeth.
Will a night splint stop me grinding?
Usually not, and it is not really meant to. The clenching is happening in your sleep and a splint does not switch that off. What it does is take the load, so the wear happens to a piece of acrylic that can be replaced rather than to enamel that cannot.
Can I use a sports mouthguard instead?
No. A sports mouthguard is designed to absorb a single impact and is made from a soft material that can encourage more clenching if worn overnight. A night splint is a different appliance, made from a firmer material and fitted to your bite.
Can worn teeth be repaired?
Yes, though it depends how far it has gone. Mild wear may just need protecting from here on. More advanced wear can be rebuilt with bonding, onlays or crowns to restore the shape and the bite. That is a bigger piece of work than a splint, which is the argument for dealing with it early.
