Can’t Open Jaw All The Way? Understanding the Causes
Being unable to open your jaw fully can be an alarming and often painful experience. This restricted movement—sometimes accompanied by clicking, locking, or sharp pain—can interfere with simple tasks like eating, speaking, or even yawning. For many patients, this limitation is more than just discomfort; it’s a sign of an underlying disorder that needs immediate attention.
At the forefront of diagnosis and non-invasive care, Dr. Nojan Bakhtiari, a respected TMJ specialist in New York City, helps patients restore proper jaw function through personalized, science-based solutions. If you’ve found yourself saying, “I can’t open my jaw all the way,” this guide will help you understand why—and most importantly, what you can do to resolve it.
What Does It Mean When You Can’t Open Your Jaw Fully?
Jaw restriction or limited mouth opening—technically referred to as trismus—is not a condition but rather a symptom. It can stem from several causes, the most common being disorders of the temporomandibular joint (TMJ).
The temporomandibular joint connects the lower jaw (mandible) to the skull, acting as a sliding hinge to allow movement. This joint is complex, involving muscles, ligaments, discs, and bones that must function in harmony. When one part of this system fails, it can limit how far you can open your mouth—sometimes suddenly, sometimes gradually over time.
Signs You May Have a TMJ Disorder
Many patients ignore early jaw discomfort until their range of motion becomes severely restricted. If you are experiencing any of the following, it’s time to consult a TMJ specialist like Dr. Nojan Bakhtiari:
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Jaw tightness or locking
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Difficulty opening the mouth more than 35-40mm (about two finger widths)
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Jaw deviation to one side when opening
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Persistent facial or jaw pain
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Headaches or ear pain without infection
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Pain when chewing or speaking
In New York City, Dr. Bakhtiari sees a wide range of patients dealing with TMJ pain, many of whom initially tried to push through the discomfort before realizing they needed expert care.
Common Causes of Limited Jaw Opening
Understanding why your jaw won’t open all the way starts with exploring the potential root causes. Some are temporary and easily resolved, while others require structured TMJ treatment from an experienced provider.
1. TMJ Disorders (TMD)
Temporomandibular joint disorders are among the leading causes of restricted jaw mobility. They may result from:
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Disc displacement: The cartilage disc inside the TMJ may slip out of alignment, preventing smooth opening.
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Joint inflammation: Arthritis or synovitis can inflame the joint lining and cause stiffness.
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Muscle dysfunction: Hyperactivity or spasm in the surrounding muscles can “lock” the jaw shut.
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Joint degeneration: Chronic wear and tear can lead to structural damage that limits motion.
2. Trauma or Injury
A blow to the jaw, head, or face can damage the joint or muscles, causing swelling or dislocation that restricts jaw opening.
3. Bruxism (Teeth Grinding)
Habitual teeth grinding or clenching—especially at night—can overwork the jaw muscles, leading to tightness, fatigue, and eventually limited mobility.
4. Infections or Inflammation
Dental infections, salivary gland swelling, or pericoronitis (inflammation around a wisdom tooth) can cause secondary jaw stiffness.
5. Post-Surgical Trismus
After dental surgery—particularly wisdom tooth extraction—temporary jaw stiffness is common. However, if it persists beyond a few weeks, it may indicate joint or muscle complications.
6. Jaw Muscle Disorders
Conditions like myofascial pain syndrome or fibromyalgia can affect the facial and neck muscles, limiting their ability to relax and function properly.
Why You Shouldn’t Ignore Limited Jaw Movement
While it might be tempting to “wait it out,” restricted jaw mobility is often a signal of deeper joint dysfunction. The longer a joint remains locked or inflamed, the greater the risk of chronic deterioration, arthritis, and compensatory muscle tension throughout the neck, shoulders, and head.
Patients who avoid addressing TMJ dysfunction often develop:
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Recurring headaches or migraines
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Neck and shoulder stiffness
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Sleep disturbances
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Difficulty eating a balanced diet
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Ongoing dental damage from grinding or clenching
Without proper TMJ treatment, these issues can become permanent. That’s why Dr. Nojan Bakhtiari urges patients in New York City to seek expert evaluation at the first sign of jaw restriction.
What to Expect from a TMJ Specialist
When you visit Dr. Bakhtiari’s Manhattan office for TMJ treatment, the first step is a detailed clinical assessment. Unlike general dentists or primary care physicians, TMJ specialists have extensive training in orofacial pain, occlusion, jaw joint mechanics, and craniofacial anatomy.
A thorough diagnosis includes:
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A comprehensive review of medical history and symptoms
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Range of motion testing
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Evaluation of muscle tenderness and joint function
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Bite and occlusion analysis
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Imaging, such as 3D cone beam CT scans or MRIs, when needed
This step is essential to pinpointing the exact cause of your limited jaw mobility and tailoring the treatment plan accordingly.
Non-Surgical TMJ Treatment Options with Dr. Nojan Bakhtiari
Most patients do not require surgery to recover from TMJ pain or jaw restriction. At Dr. Bakhtiari’s NYC practice, emphasis is placed on conservative, personalized treatments that target both symptom relief and long-term joint stabilization.
1. Custom Oral Appliances
Also known as nightguards or TMJ splints, these devices are fabricated using precise 3D imaging. Unlike over-the-counter mouthguards, custom appliances reposition the jaw to reduce muscle tension, protect teeth from grinding, and decompress the TMJ.
2. Physical Therapy Referrals
In cases involving muscle tightness or posture-related issues, Dr. Bakhtiari may refer patients to specialized TMJ physical therapists. Treatments can include:
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Manual therapy
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Stretching exercises
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Neuromuscular re-education
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Postural training
3. Injections or Joint Therapies
For patients with severe inflammation or joint locking, treatments such as trigger point injections or joint decompression techniques may be employed. These are minimally invasive and highly effective at restoring range of motion.
4. Bite Adjustment (Occlusal Therapy)
If bite alignment is a contributing factor, selective reshaping or adjusting of certain teeth can improve how the jaw functions. This is especially beneficial for patients with dental wear or previous orthodontic issues.
5. Behavioral & Stress Management
Stress and anxiety are major triggers for jaw tension and clenching. Dr. Bakhtiari offers strategies to manage stress and can recommend behavioral therapy when necessary to break harmful habits.
Why Choose Dr. Nojan Bakhtiari for TMJ Treatment in New York?
Dr. Nojan Bakhtiari is a leading authority on TMJ treatment in NYC, with advanced training in orofacial pain and a holistic, multidisciplinary approach to care. His philosophy centers on solving the root of the issue—not just masking symptoms.
Patients trust Dr. Bakhtiari because he provides:
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Thorough, evidence-based diagnosis
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Personalized, non-invasive treatment plans
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The latest imaging and diagnostic technology
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Compassionate and educational care
Whether your jaw won’t open due to muscle tension, disc displacement, or chronic arthritis, Dr. Bakhtiari will guide you toward meaningful, lasting relief—without the need for unnecessary surgery.
When Should You See a Specialist?
If your jaw hasn’t returned to normal function within a few days—or if pain is worsening—it’s time to take action. You should schedule an appointment with Dr. Nojan Bakhtiari if you experience:
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Limited jaw opening that persists for more than a week
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Clicking or locking that interferes with normal movement
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Pain radiating to your ear, temple, or neck
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Worsening symptoms when chewing or yawning
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Sudden inability to close or open your jaw fully
These symptoms rarely improve with rest alone and often require targeted therapy.
Final Thoughts: Don’t Let Jaw Pain Take Control
If you’ve found yourself thinking, “I can’t open my jaw all the way”—you’re not alone. This symptom is more than a nuisance; it can be a serious indication of joint dysfunction that deserves expert care.
Rather than relying on internet advice or temporary fixes, trust your recovery to a true TMJ authority. With precise diagnostics and customized treatment, Dr. Nojan Bakhtiari helps New Yorkers regain jaw mobility, reduce pain, and prevent future complications
Book Your Appointment Today with Dr. Nojan!