Facial swelling from a tooth usually means a dental abscess, a pocket of infection. Go to a hospital emergency room straight away if you have trouble breathing, swallowing or speaking, swelling spreading to your eye or neck, or you cannot open your mouth. Otherwise, see a dentist the same day: the pus must be drained and its source treated.
Why a tooth can make your face swell
A dental abscess is a collection of pus, the thick fluid the body produces when it fights bacteria. Deep decay (a cavity) or a crack lets bacteria reach the pulp, the soft nerve tissue inside the tooth. Or bacteria collect in a deep pocket between the gum and the tooth in advanced gum disease. A partly erupted wisdom tooth can also become infected under the flap of gum that covers it.
As pus builds up, it looks for a way out through the bone. When it spreads into the soft tissues of the cheek, the jaw or the area under the chin, the face swells. It is often warm, tender and firm, with throbbing pain, a bad taste or a raised temperature. The pain may even ease as the swelling grows: this does not mean the infection is going away, only that it has spread.
Warning signs: go to the emergency room now
Most dental abscesses stay local and are treated at the dentist. Sometimes, though, the infection spreads into the deeper spaces of the face and neck, where swelling can press on the airway. This is uncommon but a medical emergency. Go straight to the nearest hospital emergency department if you notice any of the following:
- difficulty breathing, speaking or swallowing, or you cannot swallow your own saliva
- swelling under the tongue, or the floor of the mouth feels raised and hard
- swelling that spreads towards the eye or down into the neck, or affects your vision
- you can barely open your mouth (doctors call this trismus)
- a high temperature with shivering, confusion or feeling very unwell
- swelling that grows quickly, over hours rather than days
The UK National Health Service lists similar warning signs on its dental abscess page. Ask someone else to drive you and tell the emergency team the problem started from a tooth; you will still need a dentist afterwards for the tooth itself.
Seek help sooner if you have diabetes or weak immunity, are pregnant, or if the patient is a young child.
When a same-day dental visit is the right step
If you can breathe and swallow normally, can open your mouth and the swelling is limited to the gum or one part of the cheek, see a dentist, ideally the same day or the next. If anything gets worse while you wait, go to the emergency room.
A small, pimple-like bump on the gum that leaks salty liquid (a fistula, or gum boil) also signals an abscess; even if painless, it needs treatment. If you have strong pain without swelling, our guide on what to do right now for a severe toothache will help.
What to do while you wait, and what to avoid
Helpful steps
- Take an over-the-counter painkiller such as paracetamol or ibuprofen, following the leaflet and never exceeding the stated dose. Ask a pharmacist if you take other medicines or are pregnant.
- Hold a cold compress wrapped in a cloth against the cheek for short periods.
- Rinse gently with warm salt water.
- Eat soft food and drink plenty of water.
What to avoid
- Avoid hot compresses on the outside of the face unless a dentist advises them.
- Do not try to burst or cut the swelling yourself.
- Do not put aspirin or other tablets directly on the gum; they can burn it.
- Do not take leftover antibiotics or someone else’s prescription. They can hide symptoms without treating the cause.
How the dentist treats the infection
Antibiotics alone rarely cure a dental abscess, because the source of the infection stays inside the tooth or gum. Treatment aims to release the pus and remove the cause. A typical urgent visit:
- Examination and X-ray: the dentist checks the swelling, your temperature and mouth opening, then takes a small X-ray to find the tooth involved (usually 15 to 20 minutes).
- Local anaesthesia: the area is numbed. Infection can make numbing less effective, so the dentist may add more; always say if you feel pain.
- Drainage: the pus is released through the tooth or a small cut in the gum; pressure and pain often ease quickly.
- Treating the source: if the tooth can be saved, this means root canal treatment to clean and seal the inside of the tooth; if not, the tooth is removed. For an infected wisdom tooth, see our guide to wisdom tooth removal and recovery.
- Medicines when needed: antibiotics are added when the infection is spreading or you have a fever.
The first visit usually takes 30 to 60 minutes; root canal treatment is often completed at later appointments, once the swelling has settled.
Recovery, cost factors and preventing a repeat
Swelling usually starts to go down within a day or two after drainage. Call the dentist again if it grows, a fever appears or swallowing becomes difficult.
The cost depends on the number of visits, the treatment that removes the cause (root canal treatment, re-treatment or extraction), the X-rays needed and whether a crown or replacement tooth is needed later. Only a consultation can give you a clear plan and an estimate.
To lower the risk of another abscess, brush twice a day with fluoride toothpaste, clean between your teeth, keep up regular check-ups and scaling (removal of hardened tartar), and have toothache checked early.
Urgent dental care at Ajam Dental Clinic in Tripoli
The treatments that usually follow an abscess are available at Ajam Dental Clinic: extractions and oral surgery, including wisdom teeth, and root canal treatment and re-treatment, carried out by a visiting specialist endodontist. Children’s dental care is handled by Dr. Soumaya Ajam, whose specialty is paediatric dentistry. See our urgent dental care page.
If your face is swollen without any warning sign, call or send a WhatsApp message to one of our dentists (Dr. Abdel Rahman Ajam on +961 76 593 093, or Dr. Soumaya Ajam on +961 76 619 659 for children) and ask for an urgent appointment. With any warning sign, go to a hospital emergency room first.
Patients come to our clinic on Fouad Chehab Boulevard (Al-Makateb Building, 1st floor) from across Tripoli, including Al-Qobbeh, Bab al-Tabbaneh, Jabal Mohsen and Dam wa Farez, as well as from Beddawi, Minieh and the rest of North Lebanon. Contact Ajam Dental Clinic to book a consultation.
Frequently asked questions
Can a tooth abscess go away on its own?
Not really. The swelling may go down, or the abscess may burst and drain into the mouth, which often brings relief. But the bacteria that caused it usually stay inside the tooth or in the gum pocket, so the infection tends to come back, sometimes more strongly. Over time it can also damage the bone around the tooth. That is why a dentist needs to find the source and treat it, either by cleaning the inside of the tooth with root canal treatment or by removing the tooth. Feeling better is a good sign, but it is not the end of the problem.
Should I start antibiotics before seeing the dentist?
Only if a doctor or dentist prescribes them for you. Antibiotics are useful when an infection is spreading or you have a fever, but on their own they do not remove the source of an abscess, and the swelling often returns once the course ends. Taking leftover tablets or a friend's prescription can mean the wrong medicine, the wrong dose or an allergic reaction, and it may hide symptoms that should prompt urgent care. Unnecessary antibiotics also contribute to resistance, which makes future infections harder to treat. The safest route is to be examined first.
Can the tooth be treated or pulled while my face is still swollen?
In many cases, yes. Releasing the pus and removing the source of infection, by opening the tooth or by extracting it, is often what allows the swelling to settle, so dentists do not always wait for it to go down. Sometimes the dentist prefers to drain the abscess first and finish the treatment a few days later, for example when you cannot open your mouth well or the numbing is unlikely to work fully. Your dentist will explain which approach suits your situation and why, and what to watch for at home in the meantime.
My child's face is swollen near a tooth. What should I do?
Apply the same warning signs as for adults: if your child has difficulty breathing or swallowing, swelling near the eye or in the neck, a high fever or seems very unwell, go to a hospital emergency room straight away. Otherwise, arrange a dental visit quickly, ideally the same day. Baby teeth can develop abscesses too, usually from decay, and children can become unwell faster than adults. Depending on the tooth, treatment may involve cleaning the infected nerve of the baby tooth or removing it. At our clinic, children's dental care is handled by Dr. Soumaya Ajam, whose specialty is paediatric dentistry.
Is facial swelling always caused by a tooth?
No. A swollen face can also come from an infected salivary gland, a sinus infection, a skin infection, an injury or an allergic reaction. Allergic swelling of the lips, tongue or throat, especially with difficulty breathing, is an emergency in its own right and needs immediate hospital care. Swelling linked to a tooth usually comes with toothache, a tooth that hurts when you bite, a bad taste or a bump on the gum. If you are unsure of the cause, a dentist or doctor can examine you and, if needed, take an X-ray to find out where it comes from.
Can a dental abscess be treated during pregnancy?
Yes, and it should be. An untreated infection is a greater concern for mother and baby than the treatment itself. Local anaesthesia and dental X-rays, taken with the usual precautions, are generally considered safe during pregnancy, and the dentist can choose painkillers and antibiotics suitable for pregnant women. Tell the dentist how many weeks pregnant you are and which medicines you take. Any of the warning signs, such as difficulty breathing or swallowing or swelling spreading to the eye or neck, still means going to a hospital emergency room immediately.
Have a question about your teeth?
Send a WhatsApp message to Dr. Abdel Rahman Ajam or Dr. Soumaya Ajam, or call the clinic to book a consultation.
This article provides general information for patients. It does not replace an examination by a dentist, who can advise you on your own situation.