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myofascialpain.com
Atlas · Head

Lateral Pterygoid

Deep lateral jaw pain from trigger points in the primary jaw-opening muscle

Body region
Head
Trigger points
2
documented in this muscle
Common symptoms
10
patterns cataloged
Common causes
10
contributory factors

Trigger points

TrP 1

TrP1

Location. Deep jaw muscle, lateral aspect

Pain referral. Jaw, temple, ear, sinuses

  • Jaw
  • Temple
  • Ear
  • Sinus area
  • Teeth
TrP 2

TrP2

Location. Inferior head at lateral pterygoid plate

Pain referral. TMJ region and deep maxillary area

  • TMJ area
  • Deep cheek near maxilla
  • Zygomatic arch region
  • Anterior ear region
  • Maxillary sinus area

Symptoms patients report

Jaw pain. Deep lateral jaw pain from trigger points in the primary jaw-opening muscle

Clicking jaw. Disc displacement from lateral pterygoid dysfunction pulling articular disc anteriorly

Sinus pain. Referred pain to maxillary sinus region mimicking sinusitis from pterygoid trigger points

Ear pain. Deep ear pain from lateral pterygoid referral to auricular and preauricular region

Difficulty opening mouth. Limited mandibular depression from lateral pterygoid trigger point inhibition and spasm

TMJ clicking and popping. Lateral pterygoid trigger points create disc-condyle incoordination producing TMJ clicking sounds

Jaw deviation on opening. Unilateral lateral pterygoid dysfunction causes the mandible to deviate toward the affected side

Deep facial ache. Referral from the inferior head projects deep aching into the maxillary and zygomatic regions

Sensation of sinus pressure. Deep facial referral to the maxillary sinus area mimics sinusitis pressure and congestion

Limited mouth opening with pain. Trigger point shortening restricts lateral pterygoid excursion limiting condylar translation and opening

Common causes

TMJ dysfunction. Joint mechanical abnormality alters lateral pterygoid loading creating chronic muscle overwork

Teeth grinding. Nocturnal lateral jaw movements repeatedly overload lateral pterygoid muscle fibers

Jaw clenching. Sustained isometric contraction during clenching creates lateral pterygoid ischemia and fatigue

Stress. Emotional tension causes involuntary jaw muscle bracing overloading lateral pterygoid chronically

Malocclusion. Dental misalignment forces compensatory lateral pterygoid activity to achieve proper occlusion

Chronic jaw clenching. Sustained jaw clenching chronically activates lateral pterygoid for mandibular positioning creating trigger points

Excessive gum chewing. Repetitive lateral excursion during gum chewing overloads the lateral pterygoid inferior head

Prolonged dental work. Extended mouth opening during dental procedures strains the lateral pterygoid beyond its endurance

Trauma to the jaw. Direct mandibular impact can traumatically activate lateral pterygoid trigger points at its insertion

Mouth breathing. Chronic mouth breathing alters mandibular resting position increasing lateral pterygoid baseline tension

Treatment & self-care

immediate

Intraoral massage along the jaw line

Wash your hands thoroughly. Open your mouth slightly and place your index finger inside your mouth along the upper gum line, reaching toward the back of the upper jaw behind the last molar. Press gently outward and upward into the tissue — you are reaching toward the lateral pterygoid in the space behind the upper jaw. When you find a tender spot, hold gentle sustained pressure for 15-20 seconds. Work slowly and carefully, as this area is very sensitive.

Duration
1-2 minutes per side
Frequency
1-2 times per day
Expect
Gradual reduction in jaw clicking and deep preauricular pain over 1-2 weeks of consistent treatment
exercise

Jaw relaxation exercise (tongue on palate)

Place the tip of your tongue gently on the roof of your mouth just behind your upper front teeth. Allow your jaw to drop open slightly while keeping your tongue in position — this naturally relaxes the jaw muscles and prevents clenching. Hold this position for 30 seconds, breathing slowly through your nose. Practice this position whenever you notice yourself clenching, grinding, or holding tension in your jaw.

Duration
30 seconds to 1 minute per repetition, 5-10 repetitions
Frequency
Multiple times throughout the day, especially during stressful moments
Expect
Reduced habitual jaw clenching and decreased muscle tension in the lateral pterygoid within 1-2 weeks
exercise

Gentle jaw opening with resistance

Place your fist gently under your chin. Slowly open your mouth against the light resistance of your fist — do not push hard, use only about 20% of your maximum effort. Hold the open position for 5 seconds, then slowly close. Repeat 10 times. This isometric exercise helps retrain the jaw-opening muscles to work smoothly without triggering clicking or catching.

Duration
2-3 minutes per session
Frequency
2-3 times per day
Expect
Improved jaw-opening range of motion and smoother mandibular movement within 2-3 weeks
lifestyle

Soft diet modification during flare-ups

During periods of increased jaw pain or clicking, switch to soft foods that require minimal chewing — soups, smoothies, scrambled eggs, pasta, mashed vegetables, and yogurt. Avoid hard, crunchy, or chewy foods such as raw carrots, bagels, steak, gum, and hard candy. Cut food into small pieces and chew using both sides of the mouth evenly. Avoid opening the mouth excessively wide for biting.

Duration
Throughout flare-up periods, typically 1-2 weeks
Frequency
Every meal during active symptoms
Expect
Reduced mechanical load on the lateral pterygoid allowing inflammation and trigger point irritability to subside
lifestyle

Stress and clenching awareness practice

Set reminder alarms on your phone every 1-2 hours throughout the day. Each time the alarm sounds, do a jaw check: Are your teeth touching? Is your jaw clenched? Are your jaw muscles tight? If so, separate your teeth slightly, relax your jaw, and place your tongue on the roof of your mouth. Keep a brief journal noting when you catch yourself clenching — this builds awareness of your personal stress-clenching patterns.

Duration
30 seconds per check-in
Frequency
Every 1-2 hours during waking hours
Expect
Significantly reduced daytime clenching habits and lower overall jaw muscle tension within 2-4 weeks
professional

Professional TMJ evaluation

If jaw clicking, locking, or deep jaw pain persists beyond 3-4 weeks of self-care, seek evaluation from a dentist specializing in TMJ disorders or an orofacial pain specialist. They can assess disc position, joint mechanics, and occlusion. Imaging such as MRI may be recommended to evaluate the articular disc. A physical therapist experienced in TMJ rehabilitation can provide targeted manual therapy and neuromuscular retraining.

Duration
Initial consultation typically 45-60 minutes
Frequency
As needed based on symptom severity and persistence
Expect
Comprehensive diagnosis of TMJ mechanics and a targeted treatment plan that may include splint therapy, manual therapy, or other interventions
Key Takeaways
  1. Deep lateral jaw pain from trigger points in the primary jaw-opening muscle
  2. Disc displacement from lateral pterygoid dysfunction pulling articular disc anteriorly
  3. Referred pain to maxillary sinus region mimicking sinusitis from pterygoid trigger points
  4. Deep ear pain from lateral pterygoid referral to auricular and preauricular region
  5. Limited mandibular depression from lateral pterygoid trigger point inhibition and spasm