What Are the Signs You Grind Your Teeth at Night?
Signs of night-time teeth grinding can include morning jaw pain, headaches, sensitive teeth, worn enamel and chipped or cracked teeth. A partner may also hear grinding sounds while you sleep.
Night-time grinding, also called sleep bruxism, happens without conscious control. Many people do not know they are doing it until a dentist notices tooth wear or symptoms begin to develop.
What Might You Feel When You Wake Up?
Symptoms are often most noticeable in the morning because the jaw muscles have been working during sleep.
Possible signs include:
- A tired or aching jaw
- Tight facial muscles
- Pain around the temples
- A dull morning headache
- Sensitive teeth
- Earache without an ear infection
- Difficulty opening the mouth comfortably
- Pain when chewing breakfast
The jaw may feel as though it has been held in one position for a long time. Symptoms can improve as the day continues and then return the following morning.
Not every morning headache is caused by grinding. However, headaches combined with jaw tightness or tooth wear should be assessed by a dentist.
What Changes Can Teeth Grinding Cause?
Grinding places repeated force on the teeth. Over time, the enamel can become flatter, thinner or damaged.
A dentist may find:
- Flattened biting surfaces
- Shorter-looking teeth
- Small chips along the tooth edges
- Fine cracks in the enamel
- Broken fillings or crowns
- Increased tooth sensitivity
- Dents or wear on the chewing surfaces
- Teeth that no longer meet evenly
Wear can occur slowly and may be difficult to notice without comparing dental records or photographs over time.
Some people naturally have flatter teeth, and enamel can also be worn by acidic food and drinks. The dentist needs to consider the shape, position and pattern of the wear before deciding whether grinding is responsible.
Can Teeth Grinding Cause Tooth Pain?
Yes. Repeated pressure can irritate a tooth and the tissues supporting its root. The tooth may hurt when biting even when there is no cavity or visible crack.
Grinding can also expose the sensitive layer beneath the enamel. This may cause discomfort when consuming cold, hot or sweet food and drinks.
Pain may affect one tooth or several teeth. A tooth that already has a large filling, crown or small crack may become painful sooner because it is less able to tolerate the extra pressure.
Tooth pain should still be examined. Decay, infection and cracks can cause similar symptoms and may require different treatment.
Can Someone Hear You Grinding Your Teeth?
A partner or family member may hear scraping, clicking or grinding sounds while you sleep. These noises can be one of the clearest signs of sleep bruxism.
However, not all bruxism makes a noticeable sound. Some people mainly clench their teeth, holding the jaw muscles tightly without sliding the teeth against each other.
Silent clenching can still cause jaw pain, headaches and pressure on the teeth. The absence of grinding noises does not rule it out.
Are There Signs Inside the Cheeks or on the Tongue?
Repeated clenching can leave changes in the soft tissues of the mouth.
These may include:
- A ridged line inside the cheeks
- Scalloped marks along the sides of the tongue
- Tender areas where the cheek has been bitten
- Enlarged or tense jaw muscles
These signs do not confirm bruxism by themselves. Tongue and cheek marks can occur for other reasons, but they may support the diagnosis when tooth wear and morning symptoms are also present.
Why Do People Grind Their Teeth at Night?
Sleep bruxism does not always have one clear cause. It is linked to activity in the nervous system during sleep and may occur during brief changes in sleep depth.
Factors that may contribute include:
- Stress or anxiety
- Certain medicines
- Smoking
- Alcohol
- High caffeine intake
- Some sleep disorders
Bruxism has also been associated with snoring and obstructive sleep apnoea in some patients. Grinding does not mean that a person has sleep apnoea, but symptoms such as loud snoring, pauses in breathing, waking while gasping or strong daytime sleepiness should be discussed with a doctor.
The way the teeth meet may affect where the force is concentrated, but adjusting the bite is not automatically a treatment for sleep bruxism. The cause and pattern need to be assessed first.
How Does a Dentist Diagnose Night-Time Grinding?
A dentist will ask about morning symptoms, sleep habits, stress, medicines and whether anyone has heard grinding noises.
The examination may include checking:
- Tooth wear and enamel cracks
- Broken fillings or restorations
- Tooth sensitivity
- Jaw muscle tenderness
- Jaw movement
- Changes inside the cheeks or along the tongue
- How the upper and lower teeth meet
One sign alone may not be enough to confirm the cause. For example, worn enamel may come from previous grinding that is no longer active, or from acid erosion.
The dentist considers the full pattern of symptoms and damage. If a sleep disorder is suspected, further assessment by a doctor or sleep specialist may be recommended.
How Can You Protect Your Teeth?
A dentist may recommend a custom-made night guard to place between the upper and lower teeth during sleep. It creates a protective barrier and distributes pressure more evenly.
A night guard can help protect teeth, fillings and crowns, but it may not stop the grinding activity itself. The appliance also needs to be checked for wear and fit over time.
Other management may include:
- Reducing caffeine later in the day
- Limiting alcohol close to bedtime
- Avoiding smoking
- Improving sleep routines
- Managing stress
- Treating damaged or sensitive teeth
- Reviewing medicines with the prescribing doctor
- Investigating possible sleep problems
Do not stop prescribed medicine without speaking to the doctor who prescribed it.
When Should You See a Dentist?
Arrange an examination with a dentist near you if you regularly wake with jaw pain, notice new tooth sensitivity or see the edges of your teeth becoming worn or chipped.
Seek advice promptly if:
- A tooth or filling has broken
- You have strong pain when biting
- Your jaw becomes difficult to open
- A crown feels loose
- Tooth sensitivity is becoming worse
- Pain is affecting eating or sleep
Early treatment may prevent a small area of wear or cracking from developing into more extensive damage.
Final Answer
Common signs of grinding your teeth at night include morning jaw tightness, headaches, sensitive teeth, worn enamel and damaged fillings or crowns. Grinding sounds heard by another person can also be a clue, although some people clench silently.
Because these symptoms can have other causes, a dental examination is needed to confirm whether sleep bruxism is responsible and whether your teeth need protection.
