Bruxism, the clinical name for teeth grinding and clenching, is one of those conditions people usually find out about secondhand: a partner mentions the grinding noise, or a dentist points out worn-down enamel at a routine cleaning. It's quiet, it happens while you're unconscious, and by the time it's obvious, some of the damage is already done.
The Signs Most People Miss
Grinding doesn't always announce itself with an obvious sound. More often, it shows up as a cluster of smaller symptoms that seem unrelated until you connect the dots:
- Waking up with a sore or tight jaw, or a dull headache near your temples
- Teeth that look flatter, shorter, or chipped compared to a few years ago
- Increased sensitivity to hot and cold that wasn't there before
- A partner who mentions hearing grinding or clicking sounds at night
- Indentations along the inside of your cheek or the edge of your tongue
- Popping or clicking in the jaw joint (TMJ) when you chew or yawn wide
Why It Happens
Stress and anxiety are the most common triggers, which is part of why grinding tends to flare up during busier or more stressful stretches of life. Other contributors include an irregular bite, missing or crooked teeth, sleep disorders like sleep apnea, and in some cases, caffeine or alcohol intake close to bedtime. It's rarely just one cause, which is why treatment usually starts with your dentist figuring out what's actually driving it in your case.
What a Night Guard Actually Does
A night guard doesn't stop you from grinding, it protects your teeth from the consequences of it. The custom-fitted plastic guard sits between your upper and lower teeth while you sleep, absorbing the force of grinding and clenching instead of letting it wear down enamel or stress your jaw joint. Over-the-counter versions exist, but they're one-size-fits-none, bulky, and can actually make jaw alignment worse if they don't fit properly. A custom guard, molded from an impression of your own teeth, sits comfortably and does the job it's meant to do.
What to Expect Getting One
Getting fitted for a custom night guard is simple: your dentist takes an impression of your teeth (often digitally now, no goopy trays required), and a lab fabricates the guard to your exact bite. Most patients wear it in for a fitting check a week or two later to make sure it's comfortable and doing its job. From there, it's just part of the nightly routine, alongside brushing, not before it.