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Atlas · Chest

Serratus Anterior

Sharp lateral thoracic pain along mid-axillary line aggravated by arm elevation

Body region
Chest
Trigger points
1
documented in this muscle
Common symptoms
4
patterns cataloged
Common causes
6
contributory factors

Trigger points

TrP 1

Serratus Anterior

Location. Side of ribs, under arm

Pain referral. Side of chest, under arm, inner arm

  • Side of chest
  • Under arm
  • Inner arm
  • Fourth and fifth fingers
  • Breast area

Symptoms patients report

Side chest pain. Sharp lateral thoracic pain along mid-axillary line aggravated by arm elevation

Under arm pain. Deep axillary aching from trigger points in lateral serratus digitations

Pain when taking deep breath. Inspiratory pain as rib expansion stretches taut serratus anterior bands

Breast pain. Referred sensitivity in lateral breast tissue from serratus trigger point radiation

Common causes

Swimming. Repetitive protraction and upward rotation during stroke overloads serratus fibers

Weightlifting. Heavy overhead pressing demands maximal serratus activation for scapular upward rotation

Push-ups. Sustained scapular protraction under load fatigues serratus anterior rapidly

Carrying heavy bags. Unilateral loading forces serratus to stabilize scapula against downward rotation

Stress breathing. Paradoxical upper chest breathing pattern overworks serratus as rib elevator

Coughing. Forceful expiratory contractions repeatedly stress serratus rib attachments causing strain

Treatment & self-care

immediate

Side-lying stretch over pillow

Lie on your unaffected side with a firm pillow under your ribs. Extend your top arm overhead to open up the lateral rib cage. Breathe deeply into the stretched side, focusing on expanding the ribs. This gently lengthens the serratus anterior.

Duration
2-3 minutes per side
Frequency
2-3 times per day
Expect
Reduced side chest tightness and improved breathing comfort within 2-3 days
immediate

Gentle rib mobilization with breathing

Place your hands on the sides of your rib cage. Inhale deeply through your nose, directing the breath into your hands and expanding the ribs laterally. Exhale slowly and gently compress the ribs inward with your hands. This mobilizes the rib joints and releases serratus tension.

Duration
10 breath cycles per session
Frequency
3-4 times per day
Expect
Improved rib mobility and reduced pain with deep breathing within 1 week
exercise

Serratus wall slides (push-up plus)

Stand facing a wall with your hands at shoulder height. Push into the wall and then push further, rounding your upper back slightly to protract the shoulder blades. Hold for 3 seconds, then relax. This strengthens serratus anterior through its full range.

Duration
10-15 repetitions, 2-3 sets
Frequency
2 times per day
Expect
Improved scapular stability and reduced serratus compensation within 2-3 weeks
exercise

Scapular push-ups

Start in a push-up position (or on knees for easier version). Without bending your elbows, let your chest sink between your shoulder blades, then push up by spreading the shoulder blades apart. This isolates serratus anterior movement.

Duration
10-12 repetitions, 2-3 sets
Frequency
1-2 times per day
Expect
Stronger serratus anterior and reduced trigger point recurrence within 3-4 weeks
lifestyle

Activity modification and breathing practice

Reduce the volume of push-ups, swimming, or overhead pressing if they aggravate symptoms. Practice diaphragmatic breathing to reduce reliance on accessory respiratory muscles including serratus anterior. When coughing, support your ribs with a pillow to reduce strain.

Duration
Ongoing
Frequency
Daily awareness
Expect
Reduced flare-ups and improved tolerance to upper body activities within 2-3 weeks
professional

Professional evaluation for persistent rib pain

If side chest pain persists beyond 2-3 weeks of self-care, or if you have difficulty breathing, consult a physiatrist. They can differentiate serratus trigger points from rib fracture, pleurisy, or other thoracic conditions and provide targeted treatment.

Duration
Initial evaluation: 30-45 minutes
Frequency
Follow-ups as needed
Expect
Accurate diagnosis and targeted treatment plan for persistent lateral chest wall pain
Key Takeaways
  1. Sharp lateral thoracic pain along mid-axillary line aggravated by arm elevation
  2. Deep axillary aching from trigger points in lateral serratus digitations
  3. Inspiratory pain as rib expansion stretches taut serratus anterior bands
  4. Referred sensitivity in lateral breast tissue from serratus trigger point radiation