A popping, clicking, cracking, or shifting sensation near the sternum can be unsettling—especially because it occurs in the center of the chest.

Sometimes the sensation happens during a deep breath, chest stretch, push-up, overhead reach, torso rotation, or after sitting in one position for a long time.

The important point is that sternum popping is a symptom, not a diagnosis.

An occasional painless click can sometimes come from movement of musculoskeletal structures around the chest wall, ribs, cartilage, or nearby joints. But clicking accompanied by chest pain, shortness of breath, swelling, recent trauma, or symptoms after chest surgery deserves medical evaluation.

Stretching may help general upper-body stiffness in some situations, but there is not strong evidence that stretching—or assisted stretching specifically—treats sternum popping itself.

What Does “Sternum Popping” Mean?

The sternum, commonly called the breastbone, sits in the center of the chest.

It connects with several structures, including:

Rib cartilage
The clavicles near the sternoclavicular joints
The manubrium at the upper sternum
The xiphoid process at the lower end

Movement of the shoulders, spine, ribs, and breathing mechanics all change forces across the chest wall.

When someone describes “sternum popping,” the sound may not necessarily originate from the sternum itself.

Possible sources include:

Rib or costal-cartilage movement
Sternoclavicular joint movement
Other joints around the chest wall
Soft-tissue movement
Previous injury
Post-surgical movement or instability
Less commonly, specific chest-wall conditions

Where the sensation occurs, whether it hurts, and what triggers it are important distinctions.

Is Sternum Popping Normal?

Occasional painless joint noises occur throughout the body.

A single painless click during movement does not necessarily indicate an injury.

However, chest symptoms deserve more caution than a knuckle or knee popping because several potentially serious conditions can also cause discomfort in this area.

You should not assume that chest pain is harmless simply because it occurs with movement or because you also notice clicking.

Possible Musculoskeletal Sources of Chest Clicking

Several chest-wall structures can produce clicking or popping sensations.

These are possibilities—not diagnoses that can be made from the sound alone.

Sternoclavicular Joint Movement

The sternoclavicular joint connects the collarbone to the upper sternum.

Some disorders involving this joint can cause:

Clicking
Grinding
Pain
Tenderness
A sensation of movement

Clicking around the top of the sternum near the collarbone may therefore be coming from the sternoclavicular joint rather than the breastbone itself.

Rib and Cartilage Movement

The ribs connect to cartilage along the front of the chest.

Movement during:

Breathing
Reaching
Rotation
Pressing exercises
Coughing

changes forces across the chest wall.

Some people perceive this movement as clicking or popping.

Persistent painful clicking should not simply be attributed to “tight ribs” without evaluation.

Costochondritis

Costochondritis is inflammation of the cartilage where the ribs connect to the sternum.

It generally causes:

Chest-wall pain
Tenderness
Pain with deep breathing
Pain with coughing or movement

Costochondritis is primarily a pain condition, not simply a popping condition.

Popping or clicking by itself is not a typical basis for diagnosing costochondritis.

It can resemble other causes of chest pain, which is why chest pain should not be self-diagnosed.

Slipping Rib Syndrome

Slipping rib syndrome affects the cartilage of the lower ribs rather than the sternum itself.

It can produce:

Intermittent chest or upper-abdominal pain
Clicking
Popping
A slipping sensation

It commonly involves pain together with clicking or popping, which is why some people may mistakenly describe it as a sternum problem.

This is another example of why the perceived location of a “sternum pop” may not identify the actual structure involved.

Previous Trauma

A fall, collision, sports injury, or direct blow to the chest can injure:

Ribs
Cartilage
Sternum
Surrounding muscles

New clicking after chest trauma should be evaluated, particularly if accompanied by pain, tenderness, bruising, or breathing difficulty.

Sternum Clicking After Chest Surgery

Clicking after a sternotomy or other chest surgery deserves special attention.

Persistent clicking after sternotomy, particularly when paired with pain or a sense of movement, can be associated with sternal instability or nonunion and should be reviewed by the surgical team.

If you have had recent or previous chest surgery and experience:

New clicking
Increasing movement at the sternum
Significant pain
Wound changes
Fever
Swelling

contact your surgeon or medical team.

Do not attempt aggressive chest stretching to “loosen” or “realign” a postoperative sternum.

When Sternum Popping Needs Medical Attention

Chest clicking without pain is very different from clicking associated with chest symptoms.

Seek urgent medical care for new, unexplained, or severe chest pain, especially if it lasts more than a few minutes or occurs with symptoms such as:

Shortness of breath
Chest pressure or tightness
Fainting or loss of consciousness
Sweating
Dizziness
Nausea
Pain spreading to the arm, neck, jaw, shoulder, or back
Coughing up blood
A rapid heartbeat with breathing difficulty

These symptoms should not be treated as a stretching or mobility problem.

Other Reasons to Get Checked

Even without emergency symptoms, medical evaluation is appropriate if you have:

Persistent or worsening chest pain
Significant tenderness around the sternum
Swelling
Visible deformity
Pain with every deep breath
Recent chest trauma
Recent chest surgery
Repeated painful clicking
A sensation that the chest wall is unstable
Symptoms that interfere with normal activity

If you are uncertain whether a chest symptom is musculoskeletal, getting it evaluated is safer than assuming it is caused by stiffness.

Does Posture Cause Sternum Popping?

There is not strong evidence that poor posture directly causes sternum popping.

This distinction is important.

Long periods of sitting can certainly contribute to feelings of:

Upper-back stiffness
Shoulder tightness
Chest tightness
Reduced movement variety

Those sensations may become more noticeable when you suddenly extend, rotate, or stretch.

But saying that rounded shoulders directly cause the sternum or costosternal joints to pop goes beyond what the evidence supports.

Posture may influence how movement feels.

It should not be presented as a proven diagnosis for chest clicking.

If prolonged sitting is contributing to general stiffness rather than unexplained chest symptoms, see Assisted Stretching for Desk Workers for broader mobility guidance.

Does Thoracic Spine Stiffness Cause Sternum Popping?

Thoracic mobility affects how the upper body moves, and the thoracic spine works together with the ribs and shoulders.

Someone with limited upper-back mobility may feel stiff during:

Rotation
Overhead reaching
Extension
Deep breathing

Improving thoracic mobility may make these movements more comfortable.

That does not mean thoracic stiffness has been proven to be the cause of sternum popping.

Does Anxiety Cause Sternum Popping?

Anxiety can make people much more aware of physical sensations in the chest.

Stress may also contribute to:

Muscle tension
Altered breathing patterns
Increased awareness of heartbeat
Greater attention to normal joint or tissue sensations

But anxiety should not automatically be blamed for new or unexplained chest symptoms.

If the symptom is new, painful, persistent, or otherwise concerning, medical evaluation remains appropriate.

Can Stretching Help Sternum Popping?

Stretching should not be viewed as a treatment for sternum popping itself.

There is no strong evidence showing that a particular chest stretch, thoracic exercise, or assisted-stretching protocol reliably eliminates sternum clicking.

However, gentle mobility work may be reasonable for someone who:

Has no concerning chest symptoms
Has not had recent chest trauma
Has not recently undergone chest surgery
Has already been medically evaluated when appropriate
Also experiences general upper-back, shoulder, or chest stiffness

In that situation, the goal is not to force the sternum to pop.

The goal is simply to maintain comfortable movement.

For a broader explanation of how practitioner-guided mobility differs from self-stretching, see What Is Assisted Stretching?.

Should You Try to Make Your Sternum Pop?

No.

You should not aggressively manipulate or stretch your chest specifically to produce a crack.

Avoid repeatedly forcing:

Extreme chest-opening positions
Aggressive twisting
Forceful spinal extension
Deep stretches that reproduce pain

A pop is not evidence that a stretch “worked.”

Mobility training should improve comfortable movement, not chase joint noises.

Gentle Mobility Options

If you have no red-flag symptoms and normal movement has already been considered appropriate, gentle exercises may include:

Thoracic Rotation

Use controlled trunk rotation without forcing the end range.

The goal is comfortable upper-back movement rather than trying to produce a click.

Gentle Chest Mobility

A mild doorway chest stretch can help address a general feeling of tightness across the front of the shoulders and chest.

Stop if it produces:

Sternum pain
Sharp rib pain
Significant clicking with discomfort
Numbness
Tingling

Shoulder-Blade Movement

Controlled scapular retraction and shoulder movement can help restore movement variety after long periods of sitting.

Comfortable Breathing

Slow breathing can help you move the rib cage without forcing deep expansion.

You do not need to perform extreme breathing drills or intentionally expand the chest until it pops.

Where Assisted Stretching May Fit

Assisted stretching is a non-medical wellness service in which a practitioner helps position your body through controlled stretches.

It may be useful for general goals such as:

Flexibility
Mobility
Upper-body stiffness
Maintaining movement
Accountability with a mobility routine

But an assisted-stretching practitioner should not diagnose the cause of sternum popping.

They should also not claim to:

Realign the sternum
Put ribs “back into place”
Treat costochondritis
Correct sternal instability
Diagnose slipping rib syndrome
Treat postoperative sternal complications

Those issues belong within medical evaluation and, when appropriate, rehabilitation.

When Assisted Stretching Is Not the First Step

Do not use assisted stretching as the first response to:

Unexplained chest pain
Recent chest injury
Significant rib pain
Shortness of breath
Swelling
Suspected inflammation
Chest-wall instability
Recent surgery
New postoperative clicking

In these situations, determine what is causing the symptom before adding external stretching force.

See Who Should Not Do Assisted Stretching? for broader safety considerations around professional stretching services.

Assisted Stretching vs Self-Stretching for Upper-Body Stiffness

If a healthcare concern has been ruled out and the goal is simply improving mobility, either self-stretching or professional assisted stretching may be reasonable.

Factor	Self-Stretching	Assisted Stretching
Cost	Usually free	Paid service
Control	You control all force	Practitioner applies or guides force
Convenience	Can be done anywhere	Requires appointment
Feedback	Self-directed	Practitioner can observe positioning
Medical diagnosis	No	No
Appropriate for unexplained chest symptoms	No	No
General mobility use	Yes, when appropriate	Yes, when appropriate

The key distinction is that practitioner assistance does not convert stretching into medical treatment.

What a Good Stretch Practitioner Should Do

If you choose professional assisted stretching after determining it is appropriate, look for a practitioner who:

Takes a health history
Asks about injuries and surgeries
Respects discomfort immediately
Explains what they are doing
Does not diagnose medical conditions
Does not make claims about putting joints or ribs back into place
Refers you to medical care when symptoms fall outside a wellness scope

You can learn more about practitioner training and credentials in Assisted Stretching Certifications.

What If Sternum Popping Only Happens During Exercise?

Consider the context.

Ask:

Is it painful?
Did it start after an injury?
Is there swelling or tenderness?
Does the chest feel unstable?
Does it happen only in one exercise?
Does reducing the range stop it?
Are there any breathing or cardiovascular symptoms?

If it is painless and occasional, changing exercise position or range may be reasonable.

If it repeatedly hurts, feels unstable, or began after trauma, stop provoking it and get evaluated.

What If It Happens During a Chest Stretch?

Do not treat the pop as the goal of the stretch.

If a gentle stretch causes a painless occasional click and there are no other concerning symptoms, the sound alone may not be significant.

But if stretching produces:

Pain
Increasing tenderness
Repeated forceful clicking
A sensation of instability

stop and have the symptom assessed.

What If the Area Is Tender?

Tenderness changes the picture.

Pain or tenderness where the ribs join the sternum can occur with chest-wall conditions such as costochondritis.

Because chest-wall pain can resemble more serious causes of chest pain, do not diagnose costochondritis from tenderness alone.

A healthcare professional can evaluate the symptom and decide whether further testing is needed to rule out other causes.

Frequently Asked Questions

Is sternum popping dangerous?

Not necessarily. Occasional painless clicking can come from musculoskeletal structures around the chest. But painful, persistent, post-traumatic, or postoperative clicking should be evaluated.

Why does my sternum pop when I stretch?

Movement of the ribs, shoulders, spine, cartilage, or nearby joints may produce a sensation that feels like it comes from the sternum. The sound alone cannot identify which structure produced it.

Why does my sternum pop when I take a deep breath?

Deep breathing expands the rib cage and changes forces across the chest wall. If the sensation is painful, new, persistent, or associated with breathing difficulty, seek medical evaluation.

Is sternum popping a sign of costochondritis?

Not by itself. Costochondritis is characterized primarily by chest-wall pain and tenderness around the rib-to-sternum cartilage. Clicking alone is not enough to diagnose it.

Can bad posture cause sternum popping?

Poor posture may contribute to feelings of upper-body stiffness, but there is not strong evidence establishing posture as a direct cause of sternum popping.

Can stretching stop sternum popping?

There is no strong evidence that stretching specifically eliminates sternum popping. Gentle mobility may improve general stiffness when it is safe to exercise, but you should not force the chest to crack.

Can assisted stretching fix sternum popping?

Assisted stretching should not be described as a treatment for unexplained sternum popping. It may help with general mobility after concerning causes have been ruled out, but it does not diagnose or treat chest-wall disorders.

What if my sternum clicks after heart surgery?

Contact your surgical or medical team, particularly if the clicking is new, persistent, painful, or associated with a feeling of movement or instability.

Should I worry if the clicking is painless?

Occasional painless clicking is generally less concerning than painful clicking, but context matters. Seek evaluation if it follows trauma or surgery, becomes persistent, or is accompanied by other symptoms.

When should I call 911 for chest symptoms?

Seek emergency help for sudden, severe, or unexplained chest pain—particularly when it occurs with trouble breathing, fainting, sweating, nausea, or pain spreading to the arm, neck, jaw, shoulder, or back.

Bottom Line

Sternum popping is a description of a sensation, not a diagnosis.

Some painless clicking may come from normal or benign movement of structures around the chest wall.

Other situations—particularly clicking associated with pain, injury, swelling, instability, shortness of breath, or previous chest surgery—deserve medical evaluation.

Do not aggressively stretch or manipulate your chest to make it pop.

If serious or structural causes have been ruled out and you simply experience general upper-body stiffness, gentle mobility or assisted stretching may be reasonable.

The goal should be comfortable movement—not forcing a crack.