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myofascialpain.com
Atlas · Neck

Scalenes

Radiating ache from shoulder down the arm following brachial plexus distribution

Body region
Neck
Trigger points
3
documented in this muscle
Common symptoms
16
patterns cataloged
Common causes
18
contributory factors

Trigger points

TrP 1

TrP1

Location. Side of neck, deep to SCM

Pain referral. Chest, shoulder, arm, hand

  • Chest
  • Shoulder
  • Front of arm
  • Back of arm
  • Thumb and index finger
  • Whole hand
TrP 2

TrP2

Location. Middle scalene, lateral aspect of neck

Pain referral. Pectoral region, medial arm, radial forearm, and thumb

  • Pectoral region
  • Medial upper arm
  • Radial forearm
  • Thumb and index finger
  • Anterior deltoid area
TrP 3

TrP3

Location. Posterior scalene, posterolateral neck

Pain referral. Deep upper back between scapulae

  • Deep interscapular region
  • Upper back between scapulae
  • Medial border of scapula
  • Posterior shoulder

Symptoms patients report

Arm pain. Radiating ache from shoulder down the arm following brachial plexus distribution

Numbness in hand. Paresthesia in fingers from scalene compression of brachial plexus nerve trunks

Chest pain. Anterior chest aching that mimics cardiac pain from pectoralis referral overlap

Shoulder pain. Deep shoulder ache from scalene-referred pain overlapping supraspinatus distribution

Thoracic outlet symptoms. Neurovascular compression causing arm numbness, weakness, and coolness in the hand

Arm pain radiating to thumb. Middle scalene trigger point compresses lower trunk brachial plexus referring pain distally to thumb

Pectoral ache. Referred anterior chest pain from scalene trigger point mimicking pectoralis pathology

Forearm pain on thumb side. Radial forearm pain from C6-C7 nerve root irritation at interscalene triangle compression

Hand weakness. Brachial plexus compression reduces motor output causing functional hand grip weakness

Numbness in thumb and index finger. Sensory fiber compression in scalene triangle produces C6 dermatome paresthesia pattern

Chest tightness on one side. Unilateral pectoral referred pain creates sensation of chest wall constriction

Deep aching between shoulder blades. Posterior scalene trigger point refers deep interscapular pain through posterior primary rami convergence

Upper back stiffness. Taut posterior scalene restricts cervicothoracic mobility creating upper back rigidity

Difficulty taking deep breath. Posterior scalene dysfunction impairs first rib elevation reducing thoracic expansion capacity

Interscapular pain worse with arm use. Arm movements alter scapular position stressing posterior scalene referral zone between scapulae

Posterior shoulder ache. Referred pain from posterior scalene radiates to posterior deltoid and scapular region

Common causes

Shallow breathing. Upper chest breathing pattern chronically overworks scalenes as accessory respiratory muscles

Stress. Emotional tension elevates the first rib through sustained scalene contraction

Poor posture. Forward head position increases scalene workload to stabilize the cervical spine laterally

Carrying heavy bags. Shoulder strap weight depresses the shoulder causing reactive scalene elevation guarding

Sleeping position. Side sleeping with poor pillow support laterally flexes neck straining scalenes overnight

Whiplash. Rapid lateral cervical acceleration strains scalene fibers causing acute traumatic activation

Overhead activities. Sustained arm elevation requires continuous scalene stabilization of upper ribs

Shallow upper chest breathing. Accessory respiratory pattern recruits scalenes for every breath creating cumulative overuse

Carrying heavy loads at sides. Bilateral arm loading depresses shoulder girdle eccentrically straining scalenes

Whiplash injury. Cervical acceleration-deceleration traumatically overloads middle scalene fibers

Playing wind instruments. Forced expiratory effort against resistance requires sustained scalene respiratory activation

Sleeping with arm overhead. Overhead arm position during sleep compresses neurovascular bundle at scalene triangle

Chronic coughing or asthma. Repeated forceful expiration and respiratory distress overworks scalene accessory muscles

Forward head posture. Anterior head position eccentrically loads posterior scalene creating chronic strain and trigger points

Chronic respiratory issues. Persistent respiratory difficulty overworks posterior scalene as accessory breathing muscle

Paradoxical breathing patterns. Reversed diaphragmatic pattern forces all scalenes including posterior to work with every breath

Heavy overhead lifting. Overhead loading requires scalene cervical stabilization overworking posterior scalene fibers

Swimming (freestyle stroke). Repeated head rotation during freestyle breathing cyclically loads posterior scalene

Treatment & self-care

immediate

Self-massage along the side of the neck

Tilt your head slightly away from the painful side. Using the fingertips of the opposite hand, gently press into the muscles along the side of your neck just above the collarbone. Apply slow, steady pressure and hold each tender spot for 20-30 seconds. Work from just behind the ear down to the collarbone, never pressing on the front of the throat.

Duration
3-5 minutes per side
Frequency
2-3 times daily
Expect
Reduced neck tightness and decreased arm tingling within a few days of consistent use
immediate

Moist heat on the side of the neck

Place a warm, damp towel or microwavable moist heat pack along the side of your neck from behind the ear down to the top of the shoulder. The warmth should feel soothing, not burning. Sit in a relaxed position with your shoulders dropped and breathe slowly while applying the heat.

Duration
15-20 minutes per application
Frequency
2-3 times daily as needed
Expect
Improved blood flow and muscle relaxation within minutes, with reduced neck stiffness and arm symptoms after consistent use
exercise

Lateral neck stretch (ear to shoulder)

Sit or stand tall with relaxed shoulders. Slowly tilt your head to one side, bringing your ear toward your shoulder without lifting the shoulder. You should feel a gentle stretch along the opposite side of your neck. Hold for 20-30 seconds, then switch sides. For a deeper stretch, gently place your hand on top of your head to add light pressure.

Duration
20-30 seconds per side, 3-4 repetitions
Frequency
3-4 times daily, especially during work breaks
Expect
Improved lateral neck flexibility and reduced scalene tension within 1-2 weeks of consistent practice
exercise

Scalene-specific stretch with rotation

Sit upright and turn your head about 45 degrees to one side. From this rotated position, gently tilt your head back slightly as if looking up at the ceiling at an angle. You should feel a stretch along the front-side of your neck on the opposite side. Hold for 15-20 seconds, return to neutral, and repeat on the other side. Keep your shoulders relaxed throughout.

Duration
15-20 seconds per side, 3 repetitions each
Frequency
2-3 times daily
Expect
Targeted scalene lengthening that reduces neck tightness and arm radiation over 2-3 weeks
lifestyle

Avoid heavy shoulder bags and correct forward head posture

Switch from single-strap bags to a backpack or cross-body bag to distribute weight evenly. At your desk, position your monitor at eye level and sit with your ears aligned directly over your shoulders. Practice diaphragmatic breathing by placing one hand on your chest and one on your belly, ensuring the belly hand rises more than the chest hand during each breath.

Duration
Ongoing habit changes
Frequency
Throughout each day, with posture checks every 30-60 minutes
Expect
Significant reduction in scalene overload and arm symptoms over 2-4 weeks as breathing patterns and posture improve
professional

Professional evaluation for persistent arm symptoms

If you experience persistent numbness, tingling, or weakness in the arm and hand that does not improve with self-care within 2-3 weeks, schedule an appointment with a physical therapist or physician. Mention that your symptoms include arm radiation and hand numbness, as these may require evaluation for thoracic outlet syndrome or cervical radiculopathy.

Duration
Initial evaluation: 45-60 minutes
Frequency
As recommended by the specialist
Expect
Accurate diagnosis distinguishing scalene trigger points from thoracic outlet syndrome or nerve compression, with a targeted treatment plan that typically resolves symptoms within 4-8 sessions
Key Takeaways
  1. Radiating ache from shoulder down the arm following brachial plexus distribution
  2. Paresthesia in fingers from scalene compression of brachial plexus nerve trunks
  3. Anterior chest aching that mimics cardiac pain from pectoralis referral overlap
  4. Deep shoulder ache from scalene-referred pain overlapping supraspinatus distribution
  5. Neurovascular compression causing arm numbness, weakness, and coolness in the hand