Tooth Pain That Comes and Goes: What Could Be Causing It?

A sudden zing when you sip something cold, a sharp twinge when you chew on one side, an ache that fades as quickly as it appears, tooth pain that comes and goes is common, but it is also a sign to pay attention. Intermittent tooth pain can be related to nerve irritation inside a tooth, tiny cracks, gum recession, bite stress, or even sinus pressure. Understanding the pattern of your symptoms helps you decide what to monitor at home and when to book a visit.

This guide explains likely causes of intermittent tooth pain, why symptoms fluctuate, and how Florence Dentistry in downtown Ottawa assesses and treats these issues to protect your comfort and your smile.

How tooth pain works, why it flares then fades

Teeth are hard on the outside but alive on the inside. The inner space, called the pulp, contains nerves and blood vessels. The tissues around the roots also have nerves that sense pressure. When the nerve or surrounding tissues are irritated by cold, sweets, pressure, or inflammation, you can feel brief zingers or a dull ache. Once the trigger is removed, the irritation may settle, and the pain fades until the next trigger.

A few quick clues:

• Short, sharp twinges with cold air or iced drinks often point to exposed dentin near the gumline or early nerve irritation.
• Pain when biting or on release of pressure can suggest a micro-crack or a high bite point.
• Dull, lingering pain or discomfort that wakes you at night is more likely to involve deeper nerve inflammation.

Recognizing these tooth nerve pain symptoms helps your dentist pinpoint the cause and choose the right solution.

Common dental causes of tooth pain that come and go

Intermittent tooth pain has more than one potential source. Often, several factors overlap.

Early nerve irritation and reversible pulpitis

• What it feels like: Sensitivity to cold or sweets that fades within a few seconds once the trigger is gone.
• Why it happens: Enamel wear, exposed dentin, or a developing cavity can allow stimuli to reach the nerve more easily.
• Why it comes and goes: The nerve is irritated but still healthy enough to recover between triggers.

Gentle home care, desensitizing toothpaste, and addressing early decay can calm these symptoms before they progress.

Micro-cracks and cracked tooth patterns

• What it feels like: A sharp, pinpoint pain when biting or when you release your bite. It may be hard to tell exactly which tooth is involved.
• Why it happens: Teeth flex slightly during chewing. Tiny cracks can open under pressure, irritating the inner tissues.
• Why it comes and goes: The crack opens with certain bites and closes again, so the pain depends on what and how you chew.

Early diagnosis and stabilization reduce the chance of the crack deepening.

Bite-related stress and clenching

• What it feels like: Soreness in a specific tooth or area, worse after waking or late in the day. Some people notice headaches or jaw tenderness.
• Why it happens: Nighttime grinding or daytime clenching can overload the ligament around a tooth and irritate the nerve.
• Why it comes and goes: Symptoms build with stress or heavy chewing days, then ease with rest or protection.

Reducing excessive bite forces helps the tissues recover.

Tooth decay, especially around old fillings

• What it feels like: Twinges with sweets, cold, or when food gets caught between teeth. Pain may be inconsistent.
• Why it happens: New cavities or leakage around older fillings allow fluids and bacteria to irritate the inner tooth.
• Why it comes and goes: Symptoms vary with diet, temperature, and whether food is trapped.

Timely repair prevents deeper involvement of the nerve.

Gum recession and exposed root surfaces

• What it feels like: Short, sharp sensitivity to cold air, brushing, or sweets right at the gumline.
• Why it happens: When gums pull back, the root surface is exposed. Root dentin transmits temperature changes more easily than enamel.
• Why it comes and goes: Sensitivity is triggered by specific exposures and eases afterward.

Gentle brushing, desensitizing products, and smoothing rough edges help.

Recent dental work or whitening

• What it feels like: Temporary sensitivity to temperature after a filling, cleaning, or whitening.
• Why it happens: The tooth needs a short time to settle after treatment, or whitening temporarily opens microscopic tubules in enamel.
• Why it comes and goes: Sensitivity usually improves over days to a couple of weeks.

If sensitivity worsens or lingers, a quick check is worthwhile.

Orthodontic movement with braces or clear aligners

• What it feels like: Pressure tenderness when switching to a new aligner or after an adjustment.
• Why it happens: Teeth are moving through bone, which briefly inflames the supporting tissues.
• Why it comes and goes: Soreness peaks shortly after changes, then fades as teeth settle.

Mild, short-term tenderness is typical. If pain is sharp or persists, contact your dental team.

Non-dental causes that can mimic intermittent tooth pain

Sinus congestion and pressure

Upper back teeth share a thin wall with the sinus. When sinuses are inflamed from a cold or allergies:

• Multiple upper teeth on one side can ache or feel heavy.
• Pain may change with head position, such as bending forward, or with altitude.
• Cheeks may feel tender, and the nose may be congested.

If dental sources are ruled out, addressing the sinus issue often resolves the tooth-like pain.

Jaw joint and chewing muscles

Tense chewing muscles or jaw joint irritation can refer pain to molars. You might notice:

• Achy molars without a clear trigger tooth.
• Jaw fatigue, clicking, or morning stiffness.
• Headaches near the temples or around the ears.

Managing clenching and supporting the jaw can reduce these symptoms.

Why symptoms fluctuate

Intermittent pain patterns offer diagnostic clues:

• Trigger dependent: Cold, sweets, or chewing switch pain on and off, suggesting exposed dentin, early nerve irritation, or a crack.
• Inflammation cycles: Tissues irritated by clenching or a high bite point can calm with rest, then flare after heavy use.
• Referred pain: Nearby teeth or muscles can make a healthy tooth feel sore, which then subsides unpredictably.
• Environmental shifts: Ottawa’s winter air, frequent iced drinks, or barometric changes with flights can trigger sensitivity that fades when conditions change.

Sharing these patterns with your dentist speeds up diagnosis.

When to monitor at home, and when to book a visit

Some brief, mild sensitivity can be watched for a short time. Other symptoms mean it is time to schedule care.

It is reasonable to monitor briefly if

• Sensitivity is mild and lasts only a few seconds after cold or sweets.
• You recently had whitening or a routine cleaning, and the tooth is otherwise fine.
• Symptoms improve over a week as you avoid triggers and use a sensitive toothpaste.

Book a dental visit in Ottawa if

• Pain lingers more than a few seconds after a trigger or wakes you at night.
• You feel sharp pain when chewing or when you release your bite.
• A tooth is tender to the touch, or you notice a new crack, chip, or loose filling.
• There is a pimple on the gums, bad taste, swelling, or heat sensitivity.
• Intermittent tooth pain keeps returning despite home care changes.

Seek urgent care if

• Facial swelling, fever, or spreading pain is present.
• Pain is severe and constant, or you cannot bite down at all.
• You have sustained facial trauma along with tooth pain.

Prompt assessment helps protect both comfort and tooth health.

What to expect at Florence Dentistry

Our goal is to find the cause quickly and provide clear, comfortable solutions.

A focused conversation and exam

We start by reviewing your symptoms, triggers, and recent changes such as new dental work, colds, or travel. We then examine your teeth, gums, bite, and jaw muscles to locate the source of pain.

Comfortable diagnostics when needed

Targeted tests help differentiate causes:

• Temperature checks pinpoint nerve sensitivity.
• Gentle bite tests identify cracked tooth patterns or high bite points.
• Digital x‑rays assess for decay, infections, or problems around older fillings.
• Photos document cracks, gum recession, or wear for monitoring.

A clear, conservative-first plan

We explain what is causing your intermittent tooth pain, outline options, and match treatment to your goals. Many issues improve with conservative care, and if specialized treatment is needed, we coordinate appropriate referrals and support your follow-up.

Treatment options based on the cause

Because intermittent tooth pain has different origins, treatment is tailored to your situation.

Calming sensitivity and exposed roots

• At home: Use a soft toothbrush with light pressure and a sensitivity toothpaste. Give it two full weeks to build effect.
• In office: Desensitizing treatments and fluoride varnish can soothe exposed areas.
• Smoothing and sealing: If small notches or rough edges near the gumline trap plaque or trigger zingers, tooth-coloured bonding can smooth and protect the surface.

Repairing decayed or worn fillings

• Early cavities or leaky margins are addressed with conservative, tooth-coloured fillings.
• If a tooth has large wear or cracks under an old filling, a crown or onlay may be recommended to restore strength and comfort.

Stabilizing cracked teeth

• If a bite test points to a crack, supporting the tooth reduces flexing and pain. Depending on the crack’s location and depth, options range from bonding to full coverage with a crown.
• Minor craze lines that are not causing symptoms may simply be monitored with photos and regular checkups.

Managing bite stress and clenching

• If grinding or clenching is contributing to intermittent pain, a custom night guard can reduce forces on teeth and supporting tissues.
• Minor bite adjustments can smooth a high spot that is overloading a specific tooth.

Root canal therapy when the nerve is not healing

• Lingering, spontaneous, or night pain can indicate that the pulp is not recovering on its own.
• Root canal therapy removes the inflamed tissue inside the tooth, relieves tooth nerve pain symptoms, and preserves the tooth’s function.
• This care can be provided in-office or, when appropriate, in coordination with a trusted endodontist.

Sinus-related guidance

• If your symptoms and exam suggest sinus involvement, we will explain the findings and coordinate with your healthcare provider as needed. Managing the sinus issue typically resolves the dental-like pain.

Orthodontic and aligner-related tenderness

• If you are in orthodontic treatment, we will confirm that soreness is consistent with normal tooth movement.
• Tips such as switching aligners in the evening, using cool water rinses, and avoiding very hard foods during the first 24–48 hours after a change can help.

Practical steps you can try at home while you arrange care

• Switch to a soft or extra-soft brush and use small, gentle circular strokes at the gumline.
• Use a sensitive toothpaste twice daily and avoid rinsing vigorously after brushing so helpful ingredients can stay on the tooth surface longer.
• Limit very cold drinks and very hard or sticky foods on the tender side.
• Rinse gently with lukewarm salt water if gums feel irritated.
• Keep notes on triggers, duration, and location to share at your appointment.
• Use over-the-counter pain relievers as directed by your healthcare provider if needed.
• Do not apply aspirin or other medications directly to the tooth or gums, as this can burn tissues.

These steps can make you more comfortable, but they are not a substitute for a diagnosis.

Frequently asked questions

Does intermittent tooth pain always mean a cavity?

Not always. While a cavity can cause tooth pain that comes and goes, other causes include early nerve irritation, gum recession, bite stress, micro-cracks, sinus pressure, and recent whitening. A brief exam clarifies the source and the simplest way to feel better.

How can I tell tooth nerve pain symptoms from gum pain?

Nerve-related pain often reacts to cold, sweets, or biting and may linger for a few seconds. Gum pain is more likely to involve tenderness to touch, swelling, or bleeding when brushing or flossing. Both benefit from professional evaluation.

Why does my tooth hurt only when I chew?

Pain on biting or on release often points to a crack, a high bite point, or inflammation in the ligament around the tooth. Early evaluation helps prevent progression and can keep treatment conservative.

Can sinus problems really cause tooth pain?

Yes. The roots of the upper back teeth are close to the sinus. Congestion and pressure can make several teeth ache in a way that mimics a dental problem. If dental causes are ruled out, addressing the sinus issue usually resolves the discomfort.

How long should I wait before seeing a dentist for intermittent tooth pain?

If pain is mild and short-lived, try sensitivity care for about a week. If pain lingers after triggers, wakes you at night, returns repeatedly, or is sharp with chewing, book a visit. Swelling, fever, or facial pain requires prompt attention.

How Florence Dentistry supports lasting comfort and prevention

• Personalized assessment: We take the time to understand your symptoms, examine your teeth and bite, and identify the cause of your intermittent tooth pain.
• Gentle, targeted care: From desensitizing treatments and tooth-coloured fillings to stabilizing cracked teeth, we match solutions to your needs.
• Bite and grinding management: Custom night guards and precise bite adjustments help reduce excessive forces that can trigger pain.
• Root canal therapy when appropriate: If the nerve is not healing, treatment is provided in-office or with a trusted endodontist, with your comfort as the priority.
• Clear guidance and follow-up: We explain what to expect, share home care tips that fit your routine, and monitor healing to prevent recurrence.

If you are experiencing tooth pain that comes and goes, our downtown Ottawa team is here to help with friendly, practical care that protects your smile.

Trusted resources for further reading

• Canadian Dental Association, tooth sensitivity and prevention
• Ontario Dental Association, symptoms that warrant a dental visit
• Ottawa Public Health, adult oral health resources

These resources are educational and do not replace a personalized dental examination.

The bottom line is clear answers and timely care for intermittent tooth pain

Intermittent tooth pain is a message from your teeth and gums that something needs attention. Sometimes the solution is as simple as a gentler brushing and a sensitive toothpaste. Other times, treating a small cavity, smoothing a high bite spot, stabilizing a crack, or resolving sinus pressure is the key. Understanding your triggers and patterns helps, but a professional assessment is the best way to protect your comfort and prevent larger problems.

If you are in Ottawa and have intermittent tooth pain or tooth nerve pain symptoms, contact Florence Dentistry. We will pinpoint the cause, provide a clear plan, and help you get back to comfortable eating, drinking, and smiling.