DOES LOCKJAW GO AWAY ON ITS OWN

Does Lockjaw Go Away on Its Own?

Sometimes, yes. Mild lockjaw, known clinically as trismus, often clears up on its own within a few days to two weeks, especially when it follows minor swelling, a small muscle strain, or routine dental work. The jaw muscles that have tightened up simply relax again as the underlying irritation settles down.

But that is only true for the mild end of the spectrum. Lockjaw caused by infection, a jaw joint injury, an impacted tooth, or an inflammatory condition will not reliably resolve on its own, and waiting it out can allow the underlying problem to get worse. Some causes, including untreated infection or joint damage, do not self-resolve at all and require direct treatment before jaw movement returns to normal.

The honest answer is that how long lockjaw lasts, and whether it goes away without help, depends entirely on what is causing it. A jaw that has been locked for more than a week, that is getting tighter rather than looser, or that comes with fever, swelling, or worsening pain needs an evaluation rather than more time.

What Causes Lockjaw?

Trismus is a symptom rather than a disease, and it shows up for a range of reasons:

• Muscle strain or inflammation after dental treatment, including wisdom tooth removal
• Dental or jaw infections, such as an abscess, pericoronitis, or a deep space infection of the face and neck
• Trauma to the jawbone or jaw joint, including fractures
• Temporomandibular joint (TMJ) disorders affecting the joint itself
• Tetanus, a bacterial infection that causes sustained muscle rigidity
• Tonsillitis, mumps, or other infections near the jaw and throat
• Arthritis or autoimmune conditions that increase inflammation in the joint
• Head and neck cancer treatment, including radiation therapy
• Certain medications that affect motor nerve function

Each of these causes behaves differently once it takes hold, which is why the same symptom, a jaw that will not open, can mean very different things for two different patients.

How Long Each Cause Typically Lasts

Timelines vary widely depending on the source of the problem:

• Post-surgical swelling: Usually improves within 3 to 7 days as inflammation subsides.
• Muscle strain or overuse: Often resolves in a few days to a week with rest and gentle movement.
• Dental infection or abscess: Improves within days once the infection is drained or treated, but will not go away on its own and can worsen quickly.
• TMJ-related trismus: Can persist for weeks and may recur if the underlying joint issue is not addressed.
• Jaw trauma or fracture: Recovery ranges from several weeks to a few months depending on severity.
• Tetanus: Requires immediate medical treatment and, even with care, may take weeks of recovery once the toxin has affected the nerves.
• Radiation-related or scar tissue trismus: Tends to be the most stubborn and often needs ongoing therapy rather than time alone.

Red Flag Symptoms That Mean Go Now

Certain signs point to a cause that needs prompt medical attention rather than a wait-and-see approach:

• Fever, facial swelling, or a visibly swollen jaw or neck
• Difficulty breathing or swallowing
• Pain that is steadily worsening rather than improving
• Jaw locked for more than 5 to 7 days with no change
• Recent injury to the face or jaw
• Muscle spasms elsewhere in the face, neck, or body
• An open wound, especially a puncture wound, that occurred without a recent tetanus vaccination

Any of these warrants same-day evaluation. Facial swelling paired with a locked jaw, in particular, can indicate a spreading infection that can become serious within hours, not days.

At-Home Measures That Actually Help

For mild, uncomplicated lockjaw without red flag symptoms, a few conservative steps can genuinely speed things along:

• Warm, moist compresses applied to the jaw muscles for 15 to 20 minutes several times a day
• Soft foods and liquids to reduce strain while chewing
• Gentle, gradual jaw stretching, without forcing the mouth open
• Over-the-counter anti-inflammatory medication, as appropriate for your health history
• Avoiding wide yawning, hard or chewy foods, and gum

These measures support recovery from minor causes. They do not treat an infection, a fracture, or a joint problem, and symptoms that do not improve within a few days of trying them are a sign to seek care rather than a sign to keep waiting.

Professional Treatment Options and Realistic Timelines

Once the cause is identified, treatment is targeted to it:

• Medication: Muscle relaxants and anti-inflammatories to ease muscle tension, plus antibiotics if infection is involved. Improvement is often seen within days.
• Draining an infection: Resolves the trismus that infection caused, typically within a few days of treatment.
• Jaw-stretching devices and physical therapy: Used for joint-related or scar-tissue trismus, with gradual improvement over several weeks of consistent use.
• Evaluation of the jaw joint: If TMJ disorders are driving the lockjaw, a targeted treatment plan can address the joint directly rather than just the symptom.
• Surgical treatment: Reserved for structural problems such as joint damage, significant scarring, or a fracture that will not respond to conservative care.

What Happens If Lockjaw Is Ignored?

Lockjaw that is left untreated can lead to real complications. Difficulty eating properly can cause weight loss and nutritional deficiency. Trouble brushing and flossing normally leads to worsening oral hygiene and a higher risk of cavities and gum disease. Untreated dental infections can spread into deeper tissues of the face and neck, which is a medical emergency. Jaw joint problems left unaddressed can lead to chronic pain, recurring episodes, and progressive joint damage that becomes harder to treat the longer it continues. In rare but serious cases, severe swelling or muscle spasm can interfere with breathing or swallowing.

When Does Surgery Enter the Picture?

Surgery is not the first step for lockjaw, and most cases never need it. It becomes relevant when trismus stems from a structural problem that conservative treatment cannot fix, such as a displaced jaw fracture, significant scar tissue restricting movement, or joint damage from long-standing TMJ disease. In these situations, surgical correction addresses the physical cause directly, which is the only way the jaw regains its normal range of motion. Learn more about the situations where TMJ problems require surgery versus when conservative care is enough.

Schedule a Consultation

If your jaw has been locked for more than a few days, is getting worse, or comes with swelling, fever, or pain that will not ease, do not wait to see if it resolves on its own. Dr. Raymond J. Haigney II, FACS and the team at Lake Norman Oral and Facial Surgery in Huntersville can determine the cause and start the right treatment right away. Call (704) 987-3132 or request an appointment online to get evaluated.

Related Article: Fixing a Locked Jaw