Tooth Pain: 12 Possible Causes and When You Should See a Dentist Immediately
Tooth pain can range from a brief twinge when you drink something cold to severe, throbbing pain that makes it difficult to sleep, eat, or concentrate. While some tooth sensitivity may be temporary, persistent or worsening pain can signal an underlying dental problem that needs professional attention.
Understanding the most common tooth pain causes can help you recognize when you can monitor a symptom and when you should contact a dentist promptly.
According to the CDC, more than 40% of adults report experiencing pain in their mouth within the previous year. The CDC also reports that about 1 in 5 adults ages 20–64 has at least one untreated cavity.
The important point is simple: tooth pain is a symptom, not a diagnosis. The cause may be a cavity, cracked tooth, gum problem, infection, or even pain referred from another part of the body.
Quick Answer: What Causes Tooth Pain?
The most common tooth pain causes include:
- Tooth decay or cavities
- Dental abscess or infection
- Cracked or fractured teeth
- Loose or damaged fillings
- Tooth sensitivity
- Gum disease
- Impacted wisdom teeth
- Teeth grinding or clenching
- Dental trauma or injury
- Sinus pressure or infection
- Temporomandibular joint (TMJ) problems
- Referred pain from another condition
Mild sensitivity that disappears quickly may not require emergency treatment. However, severe or persistent pain, facial swelling, fever, pain when biting, or signs of infection should be evaluated by a dentist.
If you have facial or neck swelling accompanied by difficulty breathing or swallowing, seek emergency medical care immediately. These symptoms can indicate that a dental infection has spread and may become serious.
12 Possible Tooth Pain Causes
1. Tooth Decay or Cavities
One of the most common reasons for tooth pain is dental decay.
Cavities develop when bacteria in the mouth produce acids that gradually damage tooth enamel. As decay progresses deeper into the tooth, it can cause sensitivity or pain, particularly when eating or drinking something sweet, hot, or cold.
Early tooth decay may not cause any symptoms. Once the decay advances, however, pain can develop. If the infection reaches the inner portion of the tooth, more extensive treatment may be necessary.
The CDC estimates that 20.5% of dentate adults ages 20–64 had untreated tooth decay based on national data from 2017–March 2020.
2. Dental Abscess or Tooth Infection
A dental abscess is a pocket of pus caused by a bacterial infection. It can develop when bacteria enter the inner portion of a tooth through deep decay, a crack, or other damage.
Common symptoms include:
- Severe or throbbing toothache
- Facial or gum swelling
- Fever
- Pain when chewing
- Sensitivity to hot or cold
- Bad taste or foul-smelling drainage
- Swollen lymph nodes
An untreated abscess can spread beyond the tooth and cause serious complications.
Do not ignore suspected dental infections. Prompt dental treatment is important.
3. Cracked or Fractured Tooth
A cracked tooth can cause sharp or inconsistent pain, particularly when chewing. Some people notice pain when biting down and then releasing the bite.
Cracks can result from:
- Biting hard foods
- Teeth grinding
- Trauma
- Large fillings
- Normal wear over time
Because some cracks are difficult to see, a dental examination may be necessary even when the tooth appears normal.
4. Loose or Damaged Filling
A filling restores a tooth after decay has been removed. If the filling becomes loose, damaged, or falls out, the exposed tooth may become sensitive or painful.
You may notice:
- Sensitivity to temperature
- Pain while chewing
- Food becoming trapped around the tooth
- A rough or sharp area
A dentist can determine whether the filling needs to be repaired or replaced and whether additional decay is present.
5. Tooth Sensitivity
Not every toothache is caused by an infection.
Tooth sensitivity can occur when the protective enamel becomes thinner or when gum recession exposes the tooth root. Cold drinks, hot foods, sweets, or even cold air may trigger a brief, sharp sensation.
Sensitivity can sometimes be associated with:
- Enamel erosion
- Gum recession
- Aggressive brushing
- Teeth grinding
- Tooth whitening products
- Cavities or cracked teeth
If sensitivity is new, severe, or getting worse, it is worth having the tooth examined rather than assuming it is harmless.
6. Gum Disease
Gum disease can also contribute to discomfort around the teeth.
Early gum disease, or gingivitis, may cause red, swollen, or bleeding gums. As periodontal disease progresses, the tissues and bone supporting the teeth can become damaged.
Possible symptoms include:
- Tender or swollen gums
- Bleeding while brushing or flossing
- Persistent bad breath
- Gum recession
- Loose teeth
- Pain or discomfort when chewing
The CDC identifies gum disease as one of the major oral health conditions affecting quality of life.
7. Impacted Wisdom Teeth
Wisdom teeth are the last molars to develop. When there is not enough room for them to emerge properly, they may become impacted.
An impacted wisdom tooth can cause:
- Pain at the back of the mouth
- Swollen gums
- Jaw discomfort
- Difficulty opening the mouth
- Food trapping
- Infection around the tooth
A dentist may use an examination and dental X-rays to determine the position of wisdom teeth and whether treatment is needed.
8. Teeth Grinding or Clenching
Bruxism, or chronic teeth grinding and clenching, can put significant pressure on the teeth and jaw.
People who grind their teeth may experience:
- Aching teeth
- Jaw soreness
- Morning headaches
- Tooth sensitivity
- Flattened or worn teeth
- Cracks or fractures
Stress, sleep-related factors, and bite-related issues can contribute to grinding. A dentist can evaluate signs of tooth wear and discuss appropriate treatment options.
9. Dental Injury or Trauma
A blow to the mouth can damage a tooth even if there is no obvious fracture.
Dental trauma may cause pain, sensitivity, looseness, discoloration, or swelling. Sports injuries, falls, car accidents, and biting unexpectedly hard objects are common situations where teeth can be injured.
After significant dental trauma, prompt evaluation is important because damage to the tooth’s internal tissues may not always be visible.
10. Sinus Pressure or Infection
Sometimes what feels like tooth pain does not originate from the tooth itself.
The roots of the upper back teeth are located close to the sinus cavities. Pressure or inflammation associated with a sinus infection can sometimes create aching or pressure in several upper teeth.
Sinus-related discomfort may occur along with:
- Nasal congestion
- Facial pressure
- Headache
- Postnasal drainage
- Recent cold or sinus symptoms
If several upper teeth hurt at the same time and you also have sinus symptoms, your dentist can help determine whether the pain appears dental or may have another source.
11. TMJ Disorders
The temporomandibular joints connect your jawbone to your skull. Problems involving these joints or the surrounding muscles can sometimes feel like tooth pain.
TMJ-related symptoms may include:
- Jaw pain
- Facial aching
- Ear-area discomfort
- Clicking or popping
- Difficulty opening the mouth
- Pain while chewing
Because TMJ pain can overlap with dental symptoms, professional evaluation can help identify the source.
12. Referred Pain
Occasionally, pain felt in a tooth may originate somewhere else.
For example, sinus problems, jaw-muscle issues, or other medical conditions can produce pain that feels like a toothache.
Rarely, pain involving the jaw or teeth can occur with a heart attack. If tooth or jaw pain occurs together with chest pressure, shortness of breath, sweating, nausea, or pain spreading to the arm, shoulder, back, or neck, seek emergency medical attention rather than assuming it is a dental problem.
When Should You See a Dentist for Tooth Pain?
Not every toothache requires an emergency room visit, but persistent pain should not be ignored.
Mayo Clinic recommends contacting a dentist or healthcare professional when tooth pain lasts more than a day or two or occurs with symptoms such as fever, swelling, pain when biting, red gums, or foul-tasting discharge.
Schedule a Dental Appointment Promptly If You Have:
- Tooth pain lasting more than one or two days
- Increasing sensitivity
- Pain when biting or chewing
- A cracked, broken, or loose tooth
- Swollen or bleeding gums
- A bad taste or discharge
- A loose filling or crown
- Persistent jaw pain
- Repeated episodes of toothache
Early evaluation can help identify the cause before the problem becomes more complicated.
When Is Tooth Pain a Dental Emergency?
Some symptoms require immediate attention.
Seek Emergency Medical Care If:
- You have difficulty breathing
- You have difficulty swallowing
- Significant swelling extends into your face or neck
- You have facial swelling and fever and cannot reach a dentist
- You have severe symptoms suggesting that an infection is spreading
Mayo Clinic specifically advises emergency medical care when facial swelling and fever occur together and a dentist cannot be reached, or when breathing or swallowing becomes difficult.
These symptoms can indicate that an infection has spread into deeper tissues.
What Should You Do Until You See a Dentist?
While home care cannot treat the underlying cause of most significant toothaches, several measures may provide temporary comfort.
You can:
- Rinse your mouth gently with warm water.
- Keep the area clean with careful brushing and flossing.
- Avoid foods that trigger pain.
- Choose softer foods temporarily.
- Follow the label directions for appropriate over-the-counter pain medication if it is safe for you.
- Contact your dentist for an evaluation.
Avoid placing aspirin directly against the tooth or gums, as this can irritate or damage the tissue.
Also, do not assume that pain disappearing means the problem is gone. An infected tooth can sometimes stop hurting when the nerve becomes severely damaged, while the underlying infection remains.
How Is the Cause of Tooth Pain Diagnosed?
A dentist generally begins by asking about your symptoms.
Be prepared to explain:
- When the pain started
- Whether it is constant or comes and goes
- What triggers it
- Whether hot or cold makes it worse
- Whether chewing causes pain
- Whether you have swelling or fever
- Whether you recently experienced an injury
- Whether you grind or clench your teeth
The dentist may examine the tooth and surrounding gums and may recommend dental X-rays when clinically appropriate.
The goal is to identify the source of the pain rather than simply treating the symptom.
Can Tooth Pain Be Prevented?
Many causes of tooth pain are preventable or can be detected early.
The CDC notes that oral diseases such as cavities and gum disease are largely preventable through a combination of professional dental care and self-care.
Helpful habits include:
- Brush twice daily with fluoride toothpaste.
- Clean between your teeth regularly.
- Limit frequent consumption of sugary foods and drinks.
- Wear a mouthguard during appropriate sports activities.
- Avoid using your teeth to open packages or bite hard objects.
- Address teeth grinding or clenching.
- Attend regular dental examinations.
- Have dental problems treated before they become emergencies.
Frequently Asked Questions About Tooth Pain
1. What is the most common cause of tooth pain?
Tooth decay is one of the most common causes. As decay progresses toward the inner part of the tooth, it can produce pain and sensitivity. However, gum disease, cracks, infection, sensitivity, and other conditions can also cause tooth pain.
2. How long can I wait with a toothache?
If tooth pain continues for more than a day or two, contact your dentist. Pain accompanied by swelling, fever, pain when biting, or discharge should be evaluated promptly.
3. Does tooth pain always mean I have a cavity?
No. Tooth pain can result from cavities, infections, cracks, gum disease, sensitivity, grinding, trauma, sinus pressure, TMJ problems, and other causes.
4. Can a tooth infection go away on its own?
A dental infection should not be assumed to resolve on its own. Untreated infections can develop into abscesses and may spread to surrounding tissues. Professional dental treatment is important when an infection is suspected.
5. Is severe tooth pain an emergency?
It can be. Severe pain with swelling, fever, or difficulty breathing or swallowing requires urgent evaluation. Difficulty breathing or swallowing is a reason to seek emergency medical care.
6. Why does my tooth hurt when I bite down?
Pain when biting can occur with a cracked tooth, dental infection, decay, a damaged restoration, or other dental problems. A dentist should evaluate persistent pain when chewing.
7. Why does my tooth hurt when I drink something cold?
Cold sensitivity can occur when enamel is worn, gums have receded, or the tooth’s root is exposed. However, cavities and cracks can also cause sensitivity, so persistent symptoms should be checked.
8. Can sinus problems cause tooth pain?
Yes. Sinus inflammation can sometimes cause pressure or aching that is felt in the upper back teeth because of their proximity to the sinus cavities.
The Bottom Line: Don’t Ignore Persistent Tooth Pain
Understanding the possible tooth pain causes can help you make better decisions about your oral health, but identifying the actual cause requires a professional evaluation.
A brief sensitivity may have a relatively simple explanation, while persistent pain, swelling, fever, or pain when biting may signal decay, infection, a cracked tooth, or another condition requiring treatment.
With approximately 1 in 5 U.S. adults ages 20–64 experiencing untreated cavities, tooth pain remains an important oral health concern.
The safest approach is straightforward: if tooth pain persists, worsens, or is accompanied by signs of infection, contact a dentist rather than waiting for it to become an emergency.
