Serratus Anterior Pain: Common Causes, Related Conditions, and When to See a Doctor

Serratus anterior pain is discomfort along the side of the rib cage, under the armpit, or around the shoulder blade. It commonly relates to overuse, strain, posture, or altered shoulder movement, although chest pain or breathing symptoms need timely medical assessment.

Overview: what serratus anterior pain can mean

Serratus anterior pain usually feels like aching, tenderness, tightness, or a sharp pull along the side of the chest wall. The serratus anterior is a thin, broad muscle that begins on the upper ribs and attaches to the inner border of the shoulder blade. It is active when a person reaches forward, pushes, punches, lifts, or raises an arm overhead.

In many cases, the discomfort is related to a minor muscle strain, repetitive use, or changes in the way the shoulder blade moves. However, pain in the chest or ribs is not always muscular. A careful assessment is important when symptoms are new, intense, persistent, or accompanied by symptoms such as shortness of breath, fever, dizziness, or pressure in the chest.

Because this muscle works closely with the shoulder, ribs, neck, and upper back, serratus anterior pain can be difficult to pinpoint. The pain may be felt under the armpit, at the side of the breastbone, around the lower edge of the shoulder blade, or along several ribs. The location alone cannot confirm the cause.

How the serratus anterior affects shoulder movement

The serratus anterior helps keep the shoulder blade, also called the scapula, securely positioned against the rib cage. It moves the shoulder blade forward around the chest wall and assists its upward rotation when the arm is lifted. These actions allow the shoulder to move efficiently and help protect the joint during pushing and overhead activity.

When the muscle is sore, fatigued, weak, or poorly coordinated, activities such as reaching into a cupboard, carrying a bag, doing push-ups, swimming, throwing, or turning in bed may become uncomfortable. Some people notice a pulling sensation with deep breaths because the muscle lies over the ribs and the chest wall expands during breathing.

If the serratus anterior is significantly weak, the inner edge of the shoulder blade may protrude backward rather than lying flat against the rib cage. This is known as scapular winging. It may make it harder to lift the arm above shoulder level, but it has several possible causes and should be evaluated rather than assumed to be a simple muscle injury.

Common symptoms and patterns

Symptoms vary according to the underlying cause. A muscle-related problem often causes localized tenderness that can be reproduced by pressing on the area or using the arm. Pain may increase with pushing motions, overhead reaching, twisting the upper body, forceful coughing, or deep inhalation. Stiffness around the shoulder blade and upper ribs is also common.

Some people describe a burning, cramping, or fatigued feeling after repeated activity rather than pain at rest. Others notice clicking, altered shoulder movement, or discomfort near the inner or lower border of the shoulder blade. These features can occur when the serratus anterior is not coordinating well with other shoulder-blade muscles.

A tingling sensation, numbness, marked weakness, or pain spreading down the arm is less typical of an isolated serratus anterior strain. These symptoms may indicate involvement of a nerve, the neck, or another shoulder structure. Likewise, pain that is unrelated to movement or touch should not automatically be attributed to a muscle.

• Localized side-rib or shoulder-blade tenderness
• Pain with pushing, lifting, reaching, or overhead movement
• Discomfort during deep breathing, coughing, or laughing
• Shoulder fatigue or reduced ability to lift the arm
• Visible shoulder-blade prominence or altered movement in some cases

Common causes and related conditions

Overuse and muscle strain are common explanations for serratus anterior pain. They may follow a new exercise program, a rapid increase in training volume, repeated lifting at work, rowing, swimming, climbing, boxing, or frequent push-up-type movements. A direct blow to the side of the chest, a fall, prolonged coughing, or forceful vomiting can also irritate the chest-wall muscles.

Posture and movement patterns can contribute. Rounded shoulders, prolonged desk work, limited upper-back mobility, or weakness in other muscles that stabilize the shoulder blade may place more demand on the serratus anterior. These factors do not necessarily cause pain by themselves, but they can contribute to symptoms during repetitive activity.

Related musculoskeletal conditions include intercostal muscle strain, rib irritation or fracture, costochondritis, shoulder impingement, rotator cuff disorders, and thoracic spine problems. Neck conditions, including cervical nerve root irritation, may cause pain or weakness around the shoulder blade and arm. A clinician considers the full pattern of symptoms, injury history, and physical examination findings when distinguishing among these possibilities.

Less commonly, injury or compression of the long thoracic nerve can reduce serratus anterior function and lead to scapular winging. Viral illness, inflammation, surgery, traction injury, and repetitive overhead use are among the possible contexts in which nerve-related weakness may occur. Evaluation is particularly important if shoulder-blade winging appears suddenly or progresses.

How doctors assess serratus anterior pain

Assessment begins with questions about when the pain started, its exact location, recent exercise or injury, work demands, respiratory symptoms, and any weakness or numbness. A doctor or physiotherapist may watch the shoulder blades during arm elevation or a wall push-up, examine the neck and shoulder, and gently press the ribs and surrounding muscles to identify tenderness.

The examination also looks for restricted range of motion, differences in strength, shoulder-blade winging, swelling, bruising, or signs of nerve involvement. Testing may include movements that activate the serratus anterior, but a painful response does not by itself establish a diagnosis. The goal is to identify whether the symptoms are most consistent with a muscle problem or require investigation for another cause.

Imaging is not routinely needed for a straightforward, improving muscle strain. Depending on symptoms, a clinician may recommend an X-ray to assess a suspected rib injury, ultrasound or MRI for certain soft-tissue or shoulder problems, or nerve testing when there is persistent weakness or suspected long thoracic nerve dysfunction. Heart and lung evaluation may be necessary when chest symptoms raise concern for a non-musculoskeletal condition.

Treatment, recovery, and self-care

For uncomplicated overuse or strain, initial care often includes temporarily reducing activities that clearly aggravate pain while maintaining gentle, comfortable movement. Complete immobilization is usually unnecessary and may contribute to stiffness. Cold or heat may provide short-term comfort for some people, depending on what feels better and the timing of the injury.

A healthcare professional may advise suitable pain-relief options based on the person’s medical history, other medicines, and risk factors. Non-prescription medicines are not appropriate for everyone, particularly people with kidney disease, stomach ulcers, bleeding risks, liver disease, pregnancy, or certain cardiovascular conditions. It is sensible to ask a pharmacist or clinician before using them.

Rehabilitation commonly focuses on restoring comfortable shoulder motion, improving upper-back mobility, and gradually strengthening the serratus anterior along with the rotator cuff and other shoulder-blade stabilizers. A physiotherapist can tailor exercises and guide a phased return to sport, work, or training. Returning too quickly to intense pushing or overhead activity may prolong symptoms.

Most mild muscle-related pain improves as the irritated tissue recovers and activity is gradually rebuilt. Persistent pain, repeated flare-ups, obvious weakness, or winging of the shoulder blade merits reassessment. Acibadem International’s multidisciplinary specialists and JCI-accredited hospitals can assess musculoskeletal and nerve-related causes for international patients when further evaluation is needed.

When to seek medical care

Urgent medical care is needed for chest pain or pressure that is severe, sudden, unexplained, or associated with shortness of breath, sweating, nausea, fainting, palpitations, coughing blood, or pain spreading to the jaw, back, or arm. These symptoms can have causes other than muscle strain and should not be managed with home care alone.

A person should arrange a medical appointment soon if pain follows a significant injury, there is visible deformity or extensive bruising, breathing is painful or difficult, fever is present, or symptoms are not improving after a period of relative rest. Medical advice is also important after a suspected rib injury, especially for older adults or people with osteoporosis.

Prompt evaluation is advisable for new shoulder-blade winging, inability to raise the arm normally, progressive weakness, numbness, or persistent tingling. These signs may reflect nerve or shoulder conditions that benefit from an accurate diagnosis and a structured treatment plan.

Frequently asked questions

Where is serratus anterior pain felt?

Serratus anterior pain is commonly felt along the outer side of the ribs, beneath the armpit, or around the side and lower portion of the shoulder blade. It may also be noticed at the front of the chest wall because the muscle attaches to several upper ribs. The exact location can vary with the cause and the movement that triggers symptoms.

Can serratus anterior pain hurt when breathing?

It can. Deep breathing expands the rib cage and may stretch or activate irritated chest-wall muscles, including the serratus anterior. However, pain with breathing can also occur with rib, lung, or other medical conditions, so new or significant breathing-related pain should be assessed, especially if breathlessness is present.

What causes serratus anterior muscle strain?

A strain may occur after repetitive pushing, lifting, throwing, swimming, climbing, or overhead work. It may also follow a sudden increase in exercise, a direct impact, forceful coughing, or an awkward movement. Poor shoulder-blade control and fatigue can increase stress on the muscle during activity.

What is scapular winging, and is it related to the serratus anterior?

Scapular winging describes a shoulder blade that visibly protrudes from the back rather than resting flat against the rib cage. Serratus anterior weakness is one possible cause because the muscle normally helps anchor the shoulder blade. Winging should be examined by a clinician, particularly if it is new, one-sided, or associated with weakness.

How long does serratus anterior pain last?

The recovery time depends on the cause, severity, and whether the area continues to be overloaded. Mild muscle irritation may improve over days to a few weeks with appropriate activity modification and gradual rehabilitation. Persistent or worsening symptoms should be reviewed because the diagnosis or management plan may need to change.

Can someone exercise with serratus anterior pain?

Gentle movement is often appropriate, but activities that reproduce sharp pain or significantly worsen symptoms should be reduced temporarily. A gradual return is generally safer than pushing through pain, particularly with heavy pushing or overhead exercises. A physiotherapist or doctor can advise on suitable exercises when pain is ongoing or shoulder weakness is present.

References

• American Academy of Orthopaedic Surgeons
• American Physical Therapy Association
• National Institute of Arthritis and Musculoskeletal and Skin Diseases
• Mayo Clinic
• National Heart, Lung, and Blood Institute

This article is for general information only and is not a substitute for professional medical advice. Please consult a qualified doctor about your individual situation.