A toothache that starts or becomes worse at night can make it difficult to sleep. The pain may feel like a dull ache, a sharp pulse, or pressure that spreads towards the jaw or ear. Sometimes it comes from a cavity or irritated gum; in other cases, it can signal inflammation or infection inside a tooth.
Night-time tooth pain is a symptom, not a diagnosis. Temporary steps may help you stay comfortable until you can get dental care, but they will not repair a cavity, cracked tooth or infection. This guide covers common causes, safe ways to manage discomfort for a short time, and signs that mean you should seek urgent help.
Why does a toothache feel worse at night?
Tooth pain can seem more noticeable at night because there are fewer distractions, and lying flat may increase the sensation of pressure in an already inflamed area. A tooth that has been mildly sensitive during the day can become harder to ignore when you are trying to sleep. Night-time pain does not automatically mean you have an abscess, but persistent or severe pain should be assessed.
If the pain repeatedly wakes you, lingers after hot or cold foods, or appears without a clear trigger, book a dental appointment as soon as possible. Do not wait for facial swelling to develop.
7 common causes of toothache at night
1. Tooth decay or a deep cavity
Decay develops when acids produced by plaque bacteria damage the tooth surface. A cavity may initially cause sensitivity to sweet foods or cold drinks. As it gets deeper, pain can become persistent or start spontaneously, including at night.
A dentist can examine the tooth and may take an X-ray to assess the extent of decay. Depending on the damage, treatment may involve a filling, a crown or root canal treatment. Pain relief alone cannot stop the decay from progressing.
2. Inflammation of the tooth pulp
The pulp is the soft tissue inside a tooth containing nerves and blood vessels. Deep decay, a crack or dental trauma can inflame it. Pain may be intense, throbbing, spontaneous, or continue after hot or cold triggers have gone away.
Persistent pulp inflammation needs prompt dental assessment. If the pulp is irreversibly inflamed or infected, root canal treatment or another appropriate procedure may be needed. Read more about root canal treatment and the circumstances in which a dentist may recommend it.
3. A cracked tooth or damaged filling
A small crack can cause pain when chewing or when you release your bite. A filling that has chipped or loosened may expose sensitive tooth structure. Symptoms can come and go, which makes the source hard to identify without an examination.
Avoid chewing on the affected side and do not test the tooth by biting hard objects. Arrange a dental appointment, particularly if pain is sharp, recurrent or linked to biting. Our guide to tooth pain when biting down explains other possible causes.
4. A dental abscess or infection
An abscess is a pocket of pus caused by infection. Possible signs include severe toothache, swelling of the gum or face, a bad taste, pus, fever or feeling unwell. An abscess needs urgent dental treatment and will not reliably clear up on its own.
Seek urgent dental care if you suspect an abscess. If swelling spreads towards the eye or neck, or makes breathing or swallowing difficult, seek emergency medical help immediately. Do not try to drain a swelling yourself or use leftover antibiotics.
5. Gum inflammation or food trapped between teeth
Inflamed gums, gum disease or food trapped between teeth can cause tenderness and aching. You may notice bleeding during brushing, swelling, bad breath or discomfort when biting. Gently clean around the area, but do not force sharp objects into the gum.
If the pain persists, the gums are swollen, or you notice pus or a loose tooth, arrange a dental assessment. Professional cleaning or other gum treatment may be needed depending on the cause.
6. Teeth grinding or jaw clenching
Some people clench or grind their teeth during sleep. This can strain the teeth and jaw muscles and lead to morning soreness, headaches, worn tooth surfaces or sensitivity. The pain may affect several teeth rather than one specific tooth.
A dentist can check for signs of grinding and discuss whether a custom night guard is appropriate. Jaw discomfort can have other causes too, so do not assume grinding explains every new toothache.
7. Wisdom tooth or sinus-related pain
A partially erupted wisdom tooth can trap food and bacteria under the gum, causing inflammation and pain towards the back of the mouth. Upper tooth discomfort can sometimes be related to sinus congestion, particularly when several upper teeth feel pressured and you also have nasal symptoms.
Dental and sinus problems can feel similar, so an examination is useful when the source is unclear. Severe swelling, fever, difficulty opening the mouth or worsening pain around a wisdom tooth needs prompt care.
What can you do for a toothache tonight?
If you cannot see a dentist immediately, these measures may help temporarily. They do not replace treatment of the underlying problem.
- Keep your head slightly elevated. Use an extra pillow if lying flat makes the pain feel worse.
- Rinse gently with warm salt water. Dissolve about half a teaspoon of salt in a glass of warm water, swish gently and spit it out. Do not swallow it. Avoid this for young children who cannot reliably spit.
- Clean the area carefully. Brush gently and use floss to remove trapped food if it comes away easily. Do not force floss or tools into a painful or swollen area.
- Use a cold compress for external swelling or soreness. Wrap a cold pack in a cloth and apply it to the cheek for short intervals. Do not place ice directly against the tooth or skin.
- Avoid triggers. Choose soft foods and avoid very hot, cold, sugary or hard foods if they worsen the pain. Chew on the opposite side.
- Consider an appropriate over-the-counter pain reliever. Follow the package instructions and check with a pharmacist or clinician if you have medical conditions, take other medicines, are pregnant, or are unsure what is safe for you.
- Arrange dental care. Contact your dentist as soon as possible, especially if the pain is severe, persistent or keeps returning.
Do not place aspirin directly on the tooth or gums, and do not apply alcohol, household chemicals or unprescribed substances to the area. These can injure oral tissues. Do not take more than the recommended dose of pain medicine or combine medicines without checking that it is safe.
When is a toothache an emergency?
Seek an urgent dental appointment if you have severe or worsening tooth pain, pain that keeps you awake, swelling around the gums or face, pus, a fever with dental symptoms, or difficulty opening your mouth. Tell the clinic about any swelling, fever or feeling unwell when you call.
Get emergency medical help immediately if swelling makes breathing or swallowing difficult, spreads rapidly, or affects the eye or neck. Do not wait for a routine dental appointment in these situations.
If you need help deciding what to do before reaching a clinic, read our guide to dental emergencies in Gurgaon.
How will a dentist find the cause?
Your dentist will ask when the pain started, whether it is triggered by hot or cold, whether biting makes it worse, and whether it wakes you from sleep. They may examine the teeth and gums, check existing fillings and crowns, test the tooth’s response to temperature or tapping, and take X-rays if needed.
Not every painful tooth needs the same treatment. Depending on the findings, the dentist may recommend a filling, a restoration to protect weakened tooth structure, gum treatment, root canal treatment or removal of a tooth that cannot be saved. Antibiotics are not appropriate for every toothache and do not replace dental treatment when a procedure is needed.
How can you reduce the risk of future toothaches?
- Brush twice daily with fluoride toothpaste and clean between your teeth every day.
- Limit frequent sugary snacks and drinks, which can increase the risk of tooth decay.
- Attend regular dental check-ups so early decay and gum problems can be identified.
- Ask your dentist to check a chipped filling, crown, crack or pain when biting instead of waiting for it to worsen.
- If you grind your teeth, discuss protective options and ways to manage clenching.
- Seek advice early when sensitivity becomes persistent or starts occurring without a clear trigger.
Good oral hygiene reduces risk, but it cannot prevent every crack, infection or dental problem. Persistent pain deserves professional assessment even if you brush and floss consistently.
Frequently asked questions
Why does my tooth hurt more when I lie down?
Pain can feel more noticeable when you lie down and have fewer distractions. Inflammation may also contribute to the sensation of pressure. Recurrent or severe night-time tooth pain should be assessed by a dentist rather than treated only with home remedies.
Can a toothache go away on its own?
Some irritation may settle, but pain that disappears does not always mean the underlying problem has resolved. Decay, cracks and infection can continue without constant pain. Arrange an examination if symptoms persist, return or are severe.
Will salt water cure a tooth infection?
No. A gentle salt-water rinse may help keep the mouth clean and soothe minor irritation, but it cannot cure an abscess or remove infected tissue. Suspected infection needs urgent dental assessment.
Should I take antibiotics for a toothache?
Do not start leftover or unprescribed antibiotics. Many toothaches need dental treatment rather than antibiotics, and a clinician must decide whether antibiotics are appropriate based on the diagnosis and symptoms.
Can I wait until morning if my tooth hurts at night?
If the pain is mild and there are no warning signs, contact your dentist as soon as the clinic opens. Severe pain, facial swelling, fever with dental symptoms or difficulty opening the mouth needs urgent care. Breathing or swallowing difficulty is an emergency.
Get persistent tooth pain checked
A toothache at night can be caused by a range of problems, from decay and a cracked tooth to gum inflammation or infection. Temporary steps may help you get through the night, but identifying the cause is the best way to prevent repeated pain and protect your oral health.
Smiling Faces Dentistry & Aesthetics can assess tooth pain and explain appropriate treatment options after an examination. If pain keeps returning or is interfering with sleep, arrange a dental appointment instead of relying on temporary relief.
This article is for general educational purposes and does not replace an individual dental examination, diagnosis or treatment advice.