A broken jaw, medically called a mandibular fracture, may cause swelling, bruising, bleeding inside the mouth, loose or damaged teeth, and a lower jaw that looks uneven or shifted. A key warning sign is a bite that suddenly feels wrong—when the upper and lower teeth no longer meet as they did before the injury.
Not every jaw fracture is visibly obvious. A person may have a cracked or nondisplaced jawbone with only mild swelling, jaw pain, difficulty chewing, or limited mouth opening. After a blow to the face, fall, sports injury, assault, or vehicle collision, urgent medical assessment is important if there is a changed bite, numbness of the lower lip or chin, mouth bleeding, severe pain, or trouble moving the jaw.
What does a broken jaw look like?
A fractured lower jaw can look different depending on where the bone is injured and whether the fracture has shifted out of alignment. The mandible is a curved bone that moves every time a person speaks, chews, swallows, or opens the mouth, so fractures can affect both appearance and function.
Possible visible signs of a fractured jaw include:
- Swelling along the jawline, chin, cheek, or in front of the ear
- Bruising of the chin, lower face, cheek, or inside the mouth
- A jawline that appears crooked, uneven, pushed to one side, or misshapen
- An unusual bump, indentation, or irregular contour along the lower jaw
- Bleeding from the mouth, gums, or a cut inside the mouth
- Loose, chipped, displaced, or missing teeth after an injury
- Difficulty closing the mouth because the teeth no longer fit together correctly
- Drooling because swallowing or closing the mouth is painful
- A visible wound, exposed bone, or major facial deformity after severe trauma
Swelling can conceal a change in jaw shape, and a nondisplaced fracture may leave the outside of the face looking relatively normal. For that reason, appearance alone cannot confirm or rule out a broken jaw.
Why an abnormal bite is an important sign
An altered bite, known medically as malocclusion, is one of the most important signs of a fractured jaw. Someone may say, “My teeth do not fit together anymore,” “My bite feels off,” or “I cannot close my teeth normally.”
This can happen when a fracture changes the position of part of the mandible. The bite may feel shifted on one side, leave a gap between certain teeth, or make the lower teeth sit unusually forward or backward. If the bite changes after facial trauma, the person should be assessed urgently even if swelling or bruising seems mild.
- Read more: What Does a Broken Jaw Look Like
Broken jaw symptoms to watch for
Broken jaw symptoms can range from localized tenderness to major difficulty speaking, swallowing, or breathing. Symptoms may become more noticeable as swelling develops over the first several hours after an injury.
Common mandibular fracture symptoms include:
- Jaw, chin, cheek, or ear-area pain
- Pain that worsens with chewing, biting, talking, swallowing, or jaw movement
- Swelling and tenderness over one part of the lower jaw
- Difficulty opening the mouth fully
- Difficulty closing the mouth or keeping it closed
- Jaw stiffness or muscle spasm, called trismus
- Teeth that no longer meet normally
- A sensation that the jaw is unstable, moving abnormally, or shifting sideways
- Numbness or tingling in the lower lip or chin
- Loose, cracked, displaced, or missing teeth
- Bleeding from the mouth or gums
- Difficulty chewing or inability to tolerate solid food
- Drooling or difficulty swallowing
- Pain in front of the ear, particularly when the jaw joint area is injured
Lower-lip or chin numbness after an injury
Numbness of the lower lip or chin can occur when a fracture affects nerves that supply sensation to this area. It may feel like tingling, reduced feeling, or persistent “pins and needles.” This symptom is especially important after a direct blow to the chin or lower jaw.
Numbness can also occur with swelling or other facial injuries, but it should not be ignored when it appears alongside pain, an abnormal bite, reduced mouth opening, or dental injury.
Bruising beneath the tongue
Bruising or pooled blood in the floor of the mouth, beneath the tongue, may be a sign of a mandibular fracture. It can be missed because it is inside the mouth rather than on the skin.
Do not force the mouth open to look for this sign. If opening the mouth causes severe pain, the jaw feels unstable, or there is trouble breathing or swallowing, seek emergency care immediately.
Signs of a fractured jaw by location
The mandible can fracture in different areas, and the location often affects the pattern of symptoms. A person can also have more than one fracture after a significant impact.
| Fracture area | Possible signs and symptoms |
| Chin or front of the jaw | Chin swelling, pain near the lower front teeth, gum bleeding, dental injury, altered bite |
| Side or angle of the jaw | Swelling and tenderness along one side of the lower face, pain near the back teeth, uneven jaw contour |
| Jaw joint area near the ear | Pain or swelling in front of the ear, limited mouth opening, ear-area pain, jaw shifting toward the injured side when opening |
| Tooth-bearing section of the jaw | Gum tear, bleeding, loose teeth, a visible step in the dental arch, or a fracture that communicates with the mouth |
| Multiple areas of the jaw | Greater instability, more obvious bite change, swelling inside the mouth, and a potentially higher risk of airway problems |
A healthcare professional may check for tenderness, abnormal jaw movement, a step or gap along the bone, changes in dental alignment, gum injuries, and altered sensation in the lower lip or chin. Imaging is needed to identify the fracture pattern accurately.
Broken jaw vs dislocated jaw
A broken jaw and a dislocated jaw can both be painful and can make it difficult to eat, speak, or close the mouth. However, they involve different structures and require proper assessment because a fracture and dislocation can occur together.
A broken jaw is a crack or break in the mandible. A dislocated jaw occurs when the lower jaw moves out of its usual position at one or both temporomandibular joints, where the jaw connects to the skull.
| Feature | Broken jaw | Dislocated jaw |
| Main injury | Break in the jawbone | Jaw joint moves out of its normal position |
| Common cause | Direct facial impact, fall, collision, assault, or sports injury | Very wide opening, yawning, dental treatment, vomiting, trauma, or joint instability |
| Swelling and bruising | Common, especially after direct trauma | May occur, but may be less obvious |
| Bite | Teeth may no longer fit together correctly | Mouth may be stuck open and unable to close normally |
| Jaw movement | Painful, limited, or unstable | Often difficult or impossible to close without medical treatment |
| Dental injury | Loose, chipped, displaced, or missing teeth can occur | Less common unless there was direct trauma |
| Diagnosis | Examination and imaging, often CT | Clinical examination; imaging may be used when a fracture is possible |
Do not try to force a jaw back into place. Attempting to reposition a suspected dislocation can worsen pain, move an unrecognized fracture, or damage nearby structures. Medical professionals can determine whether there is a dislocation, fracture, or both.
What causes a broken jaw?
A broken jaw usually occurs when the lower face receives a direct impact. Common causes include:
- Falls, particularly falls onto the chin
- Vehicle collisions
- Assaults or punches to the face
- Contact sports and recreational injuries
- Bicycle, skateboard, scooter, or motorcycle crashes
- Workplace injuries involving equipment or falling objects
- Accidents that cause multiple facial injuries
A fracture can occur even when there is no large visible wound. The force of a blow can travel through the jawbone and cause a break away from the point of impact.
When a broken jaw is an emergency
A suspected broken jaw requires urgent medical evaluation. In more serious injuries, bleeding, swelling, vomiting, loose teeth, or movement of the fractured bone can affect the airway.
Call emergency services or go to the nearest emergency department immediately if there is:
- Trouble breathing, choking, noisy breathing, or a sensation that the airway is closing
- Heavy or uncontrolled bleeding from the mouth or face
- Inability to swallow saliva, severe drooling, or repeated vomiting
- Rapidly increasing swelling of the tongue, floor of the mouth, face, or neck
- Loss of consciousness, confusion, seizure, severe headache, or suspected head injury
- Neck pain, weakness, numbness, or possible spinal injury
- Exposed bone, a visibly displaced jaw, or major facial deformity
- Multiple loose or missing teeth that could be inhaled
- Severe pain with inability to open the mouth, close the mouth, eat, or drink
What to do before medical care
If you think someone has a fractured jaw, do not try to test how far they can open their mouth or whether they can bite normally. Repeated jaw movement can increase pain and may worsen an unstable injury.
- Get emergency medical help if there are breathing problems, major bleeding, severe swelling, loss of consciousness, or significant facial trauma.
- Keep the person sitting upright if they are conscious and breathing comfortably.
- Support the jaw gently with a hand if movement is painful. Do not press hard or force the jaw into alignment.
- Apply a cold pack wrapped in cloth to the outside of the face for short intervals.
- Avoid food, drink, gum, and alcohol until a clinician has assessed the injury, particularly if surgery or sedation may be needed.
- Do not attempt to put a dislocated jaw back into place.
- Do not tightly tie or tape the jaw shut. Vomiting can create an airway risk if the mouth cannot open quickly.
How doctors diagnose a jaw fracture
Jaw fracture diagnosis begins with making sure the airway is safe and checking for serious head, neck, or facial injuries. Once immediate concerns are addressed, clinicians examine the lower face, teeth, gums, bite, mouth opening, and sensation in the lips and chin.
The examination may include:
- Asking how the injury occurred and whether symptoms are getting worse
- Checking whether the bite feels the same as it did before the injury
- Looking for swelling, bruising, mouth bleeding, gum tears, and dental injuries
- Feeling for focal tenderness, irregular bone edges, instability, or a step in the jawline
- Checking mouth opening and whether the jaw moves toward one side
- Testing sensation in the lower lip and chin
- Assessing for loose, fractured, displaced, or missing teeth
- Looking for associated injuries to the face, head, or neck
Imaging used for jaw fracture diagnosis
Imaging confirms whether the jaw is broken, identifies the location and direction of the fracture, and helps guide treatment. CT scans are commonly used after significant facial trauma because they provide detailed views of the jaw and surrounding facial bones.
Dental or jaw X-rays may also be used in some situations. The choice of imaging depends on the injury, the examination findings, local equipment, and whether clinicians suspect additional facial fractures.
How is a broken jaw treated?
Treatment depends on the location of the fracture, whether the bone has shifted, whether the bite is affected, whether the injury communicates with the mouth, the condition of the teeth, and whether other injuries are present. The main goals are to protect the airway, restore jaw alignment, preserve normal bite function, support bone healing, and reduce the risk of infection or long-term problems.
Emergency and early treatment
Initial care may include:
- Airway and bleeding management
- Pain relief
- Cold packs to reduce swelling
- Assessment of tetanus vaccination status when there is an open wound
- Antibiotics when the fracture is open to the mouth or there is another clinical reason to use them
- Urgent assessment by an oral and maxillofacial surgeon or a facial trauma team
A fracture that extends through gum tissue or the tooth-bearing portion of the jaw may communicate with the bacteria normally present in the mouth. Clinicians consider this when deciding on wound care and antibiotics.
Non-surgical treatment
Some stable fractures that are not displaced and do not significantly affect the bite may be treated without surgery. Management can include pain control, a temporary soft or liquid diet, instructions to avoid strain on the jaw, and close specialist follow-up.
A non-surgical plan still requires professional assessment. A fracture that appears stable initially can shift, and a bite problem may become more noticeable as swelling changes.
Surgical treatment
Surgery may be needed when the fracture is displaced, unstable, open, involves multiple areas, substantially changes the bite, or cannot be managed safely with diet and observation alone.
A common surgical approach is called open reduction and internal fixation. The surgeon realigns the broken bone and stabilizes it with small plates and screws. In some cases, temporary fixation between the upper and lower teeth may be used to restore or maintain the correct bite while healing occurs.
The best treatment approach is individualized. It depends on the fracture pattern, dental condition, other facial injuries, overall health, and the ability to maintain a safe and adequate diet.
Recovery after a fractured jaw
Recovery varies according to the location and complexity of the fracture, the type of treatment, dental injuries, overall health, smoking status, and whether complications occur. The treating clinician’s instructions should take priority because diet, activity restrictions, and follow-up needs differ from person to person.
During recovery, patients may need:
- A liquid, blended, or soft-food diet for the period advised by the treatment team
- Pain medicine and antibiotics, when prescribed, taken exactly as directed
- Careful oral hygiene based on instructions for wounds, braces, fixation devices, or surgical incisions
- Avoidance of contact sports, heavy lifting where advised, and activities that could cause another blow to the face
- Follow-up visits to monitor bite alignment, jaw movement, nerve symptoms, wound healing, and bone healing
- Dental assessment if teeth were cracked, loosened, displaced, or lost
Eating during jaw fracture recovery
A soft or liquid diet reduces stress on the healing bone and any surgical repair. Depending on medical advice, suitable choices may include yogurt, soups, porridge, mashed vegetables, eggs, smoothies, blended lentil dishes, soft rice dishes, and other foods that do not require forceful chewing.
Avoid hard, crunchy, sticky, chewy, or difficult-to-bite foods until the treating clinician says it is safe to reintroduce them. Do not rely on pain improvement alone as a reason to return to normal chewing.
Signs that recovery may not be going well
Contact the treating clinician urgently if you develop:
- Pain or swelling that increases instead of gradually improving
- Fever, chills, pus, foul taste, or increasing redness around a wound
- New difficulty breathing or swallowing
- A bite that becomes newly misaligned or progressively worse
- New or worsening numbness of the lower lip or chin
- Persistent inability to open or close the mouth as advised
- Vomiting, dehydration, or inability to maintain adequate nutrition
- A loose or damaged fixation device, or another injury to the face
Can a broken jaw heal without treatment?
A fractured jaw should never be assumed to heal correctly without medical assessment. Even if pain becomes less intense, the bone may heal in poor alignment if the fracture is displaced or the bite has changed.
Improper healing can contribute to long-term bite problems, difficulty chewing, chronic jaw pain, reduced mouth opening, facial asymmetry, dental complications, or infection—especially when the fracture communicates with the mouth.
If you have a swollen jaw after injury along with pain, an altered bite, mouth-opening problems, numbness, loose teeth, or bleeding, seek urgent medical care. Prompt assessment improves the chance of appropriate alignment and uncomplicated healing.
Key takeaways
A broken jaw may look like swelling, bruising, mouth bleeding, loose teeth, an uneven jawline, or a jaw that appears shifted. However, some mandibular fractures have subtle or no obvious external signs.
The most important clue is often a new bite change after an injury. Pain with chewing or talking, limited jaw movement, lower-lip or chin numbness, dental injury, drooling, and bruising beneath the tongue are also warning signs.
Seek emergency care immediately for breathing problems, uncontrolled bleeding, worsening swelling, inability to swallow, major facial deformity, loss of consciousness, or suspected head or neck injury.
Frequently asked questions
Can you have a broken jaw without bruising?
Yes. Bruising is common but not necessary for a fracture to be present. A nondisplaced fracture, early swelling, or a fracture near the jaw joint may cause little visible discoloration. A changed bite, jaw pain with chewing, trouble opening the mouth, lower-lip numbness, or tenderness after facial trauma can still indicate a fracture. A clinical examination and imaging may be needed to confirm or rule out the injury.
How can you tell if your jaw is broken or just bruised?
A bruised jaw can be painful and swollen, but signs more suggestive of a fracture include teeth that no longer meet normally, an inability to open or close the mouth properly, a feeling that the jaw is unstable, numbness in the lower lip or chin, mouth bleeding, loose teeth, or a visible change in jaw shape. It is not always possible to distinguish a severe bruise from a fracture at home, so persistent symptoms after facial trauma should be assessed promptly.
What does a fractured jaw feel like?
A fractured jaw may feel sharply painful, deeply aching, throbbing, or unstable. Pain often worsens when chewing, biting, speaking, swallowing, or trying to move the jaw. Some people notice that their bite is shifted, their teeth do not meet normally, or the jaw moves oddly. Ear-area pain, tenderness along the jaw, lower-lip numbness, and difficulty opening the mouth are also possible.
Can you still talk with a broken jaw?
Some people can still talk, but speaking may be painful, unclear, or limited because movement of the lower jaw aggravates the injury. Severe swelling, an abnormal bite, dental trauma, or muscle spasm can make speech more difficult. Being able to speak does not rule out a jaw fracture. Seek urgent assessment if speech is painful after trauma or occurs with a bite change, numbness, bleeding, difficulty swallowing, or breathing problems.
Is a broken jaw always visibly crooked?
No. A displaced fracture can make the jaw look crooked, uneven, or shifted, but many fractures are not outwardly obvious. Swelling may hide asymmetry, while a small or nondisplaced fracture can leave the jawline looking normal. A changed bite, pain when chewing, reduced mouth opening, nerve symptoms, and imaging findings are often more useful than appearance alone.
What should you do if you think your jaw is fractured but you can still eat?
Do not assume the jaw is unbroken because you can still eat. Avoid chewing hard foods and do not repeatedly test jaw movement. Use a cold pack wrapped in cloth on the outside of the face, and seek prompt medical evaluation—especially if your bite feels wrong, pain is significant, mouth opening is limited, teeth are loose, or your lip or chin is numb. Seek emergency care for breathing problems, major bleeding, rapidly increasing swelling, or a visible deformity.
Can a broken jaw cause ear pain?
Yes. Ear-area pain can occur when a fracture affects the part of the mandible close to the temporomandibular joint. This may be accompanied by swelling in front of the ear, reduced mouth opening, and jaw movement toward the injured side when opening. Ear pain after a chin or jaw injury should be evaluated with other symptoms, especially a bite change, swelling, or reduced jaw movement.
How do doctors check whether the jaw is broken?
Clinicians first assess airway safety and look for related head, neck, dental, or facial injuries. They ask whether the bite has changed, examine the face and mouth, check the teeth and gums, assess jaw movement, feel for tenderness or irregularity, and test sensation in the lower lip and chin. CT imaging is commonly used when a facial fracture is suspected because it can show the fracture location and pattern in detail.
Is a broken jaw treated with a cast?
No. A jaw fracture is not treated with a traditional external cast. Stable fractures may be managed with a restricted diet and close specialist follow-up. More serious injuries may require stabilization with plates and screws, temporary fixation between the upper and lower teeth, or both. The purpose is to restore the usual bite and keep the bone stable while it heals.
When can you chew normally after a jaw fracture?
The right time depends on the fracture location, how well the bite is aligned, the type of treatment, bone healing, and your clinician’s assessment. A soft or liquid diet is often needed initially to avoid stressing the healing jaw. Do not restart hard or chewy foods simply because pain has improved. Follow the staged diet plan provided by the treating team and ask before returning to unrestricted chewing.
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