Sleep bruxism, the medical term for grinding or clenching your teeth while you sleep, is remarkably common and remarkably easy to miss. You can’t feel it happening, your partner might not notice it, and the damage it causes often shows up as sensations that don’t obviously point back to your mouth.
Over the years we’ve seen patients come in for headaches, sensitive teeth, jaw pain, even ear discomfort, convinced it’s something else, only to find the culprit is nighttime grinding. Here are the five signs we see most often.
1. Morning jaw soreness
If you wake up feeling like you worked out your jaw overnight, that’s usually because you did. Bruxism involves sustained muscle contraction, sometimes for hours at a time. The muscles on the sides of your face can ache the way your biceps would after lifting, and the soreness is usually gone by mid-morning once the muscles relax.
2. Tension headaches that start at the temples
Grinding-related headaches have a specific signature. They tend to start in the temples or behind the eyes, feel like tension rather than sharp pain, and are often worst in the morning or late afternoon. They also tend to respond poorly to standard headache treatments because the root cause, jaw muscle strain, isn’t being addressed.
If you’ve been treated for migraines or tension headaches without much success, your jaw is worth a second look.
3. Unexplained tooth sensitivity
Sustained grinding wears away the enamel on the chewing surfaces of your teeth, and as the enamel thins, the tooth becomes sensitive to temperature. If you’ve developed cold sensitivity on specific teeth (often molars) without any obvious decay or cracks, wear from grinding is a common culprit.
We can spot the wear pattern during an exam. It’s distinctive, and once we see it we can usually trace it back to the underlying habit.
4. Your partner hears it
Not everyone grinds loudly, but some people do. If your partner mentions they hear you grinding, clicking, or clenching at night, take them seriously. They have the best possible monitoring position and they’re telling you what’s happening.
5. Flattened or chipped tooth edges
Look at your teeth in the mirror. Do the biting edges of your front teeth look unusually flat or uneven? Do you notice small chips along the edges that you don’t remember causing? These are classic signs of grinding damage. Healthy tooth edges have slight curves and distinct cusps. Worn edges are flat and often identical in length across several teeth.
What to do about it
The good news: sleep bruxism is very manageable with a properly fitted custom night guard. A custom guard from your dentist is thin, comfortable, and absorbs the force of grinding so your teeth don’t have to. Most patients stop experiencing symptoms within one to two weeks of consistent wear.
Store-bought guards can help in a pinch but tend to be bulky, uncomfortable, and sometimes make the problem worse by creating an unstable bite. If you’re going to invest in solving this, the custom version is worth it.
Alongside the guard, it’s worth looking at underlying stress triggers. Bruxism is strongly correlated with stress, certain medications, and sleep-disordered breathing. A dentist can evaluate your jaw and bite; if there’s a TMJ component, we can address it at the same time, and if there’s a sleep apnea component, we’ll point you toward the right specialist for a sleep study.
Come in if any of this sounds familiar
If two or three of these signs resonate, book an exam and mention it when you schedule. We’ll take a close look at your tooth wear patterns, check your jaw joint, and if bruxism is the issue, we can take an impression for a night guard at the same visit. Fastest way to stop the damage is to address it before your teeth pay the price.