Sharp Chest Pain? Why Your Sternum Is Aching: Medically-Approved Next Steps

Sharp chest pain can be frightening—especially when it feels like it's coming from the center of your chest. If the pain seems focused around your sternum (breastbone), you may wonder whether it's something minor, like muscle strain, or something serious, like a heart problem.

The truth is: sternum pain has many possible causes. Some are harmless and temporary. Others require urgent medical care. Knowing the difference is key.

Let's walk through what your sternum is, why it might hurt, and what to do next.

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What Is the Sternum?

Your sternum is the flat bone in the center of your chest. It connects to your ribs via cartilage and helps form the front wall of your rib cage. This structure:

• Protects your heart and lungs
• Supports your upper body
• Serves as an attachment point for chest muscles

Because the sternum connects to muscles, cartilage, and ribs, pain in this area often comes from musculoskeletal causes—but not always.

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Common Causes of Sternum Pain

1. Costochondritis (Very Common)

One of the most frequent causes of sternum pain is costochondritis, which is inflammation of the cartilage that connects your ribs to your sternum.

Typical signs include:

• Sharp or aching pain near the sternum
• Pain that worsens when pressing on the area
• Increased pain with deep breaths, coughing, or movement
• Pain that may feel worse with certain positions

Costochondritis is not dangerous, but it can be quite uncomfortable. It often improves with rest, anti-inflammatory medications, and time.

If you're experiencing these symptoms and want to better understand what might be causing your chest pain, you can check your symptoms with Ubie's free AI-powered tool to receive personalized insights based on your specific situation.

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2. Muscle Strain

You can strain the muscles attached to your sternum by:

• Heavy lifting
• Intense workouts
• Persistent coughing
• Poor posture
• Sudden twisting movements

Pain from a muscle strain usually:

• Feels sore or sharp
• Gets worse with movement
• Improves with rest
• Is tender to touch

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3. Acid Reflux (GERD)

Sometimes sternum pain isn't coming from the bone or cartilage at all.

Acid reflux can cause a burning or tight sensation behind the sternum, often described as heartburn.

Common signs:

• Burning in the chest
• Pain after eating
• Sour taste in the mouth
• Symptoms worse when lying down

Reflux pain can mimic heart pain, which is why new or severe symptoms should be evaluated.

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4. Injury or Trauma

A direct blow to the chest—such as from sports, a fall, or a car accident—can bruise or fracture the sternum.

Symptoms may include:

• Immediate sharp pain
• Swelling or bruising
• Pain with breathing or coughing
• Difficulty moving the upper body

If you've had trauma and suspect a fracture, medical evaluation is important.

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5. Anxiety or Panic Attacks

Anxiety can cause real physical chest pain, often described as:

• Sharp or stabbing
• Tightness or pressure
• Accompanied by rapid heartbeat
• Shortness of breath
• Dizziness

While anxiety-related pain is not life-threatening, it can feel very real and intense. However, chest pain should never automatically be dismissed as anxiety without medical evaluation—especially if it's new.

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When Sternum Pain Could Be Serious

Although many causes are harmless, some sternum pain may signal something more dangerous.

Seek immediate medical care (call emergency services) if you experience:

• Chest pressure, squeezing, or fullness lasting more than a few minutes
• Pain spreading to the arm, jaw, neck, or back
• Shortness of breath
• Nausea or vomiting
• Sweating
• Lightheadedness
• Irregular heartbeat

These can be signs of a heart attack, even if the pain feels centered in the sternum.

Other serious causes include:

• Pulmonary embolism (blood clot in the lungs)
• Aortic dissection
• Severe infections

These conditions are less common—but life-threatening. If something feels wrong or different from previous episodes, don't ignore it.

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How Doctors Evaluate Sternum Pain

If you see a healthcare provider, they will typically:

• Ask about your symptoms and timing
• Press on your sternum and chest wall
• Check your heart and lungs
• Ask about recent injuries or illness

Depending on your symptoms, they may order:

• ECG (heart tracing)
• Blood tests
• Chest X-ray
• CT scan
• Ultrasound

The goal is to rule out dangerous causes first.

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What You Can Do at Home (If It's Not an Emergency)

If your sternum pain is mild, clearly linked to movement, and not accompanied by concerning symptoms, you may try:

✅ Rest

Avoid activities that worsen the pain.

✅ Over-the-counter anti-inflammatory medications

Such as ibuprofen (if safe for you). Always follow dosing instructions and consult your doctor if you have kidney, stomach, or heart issues.

✅ Heat or ice

• Ice for the first 48 hours after injury
• Heat for muscle tightness

✅ Gentle stretching

If muscle strain is suspected.

✅ Posture correction

Poor posture places strain on chest muscles and the sternum.

If pain lasts more than a few days or keeps returning, schedule a medical visit.

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How Long Does Sternum Pain Last?

It depends on the cause:

• Muscle strain: A few days to weeks
• Costochondritis: Weeks to months (sometimes longer, but improves gradually)
• Reflux: Improves with dietary changes and medication
• Fracture: Several weeks

Persistent or worsening pain always deserves evaluation.

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Risk Factors That Increase Concern

You should be especially cautious if you:

• Are over 40
• Have high blood pressure
• Have diabetes
• Smoke
• Have high cholesterol
• Have a family history of heart disease
• Recently had surgery or long travel (risk for blood clots)

These factors increase the likelihood that chest pain may be heart- or lung-related rather than musculoskeletal.

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Frequently Asked Questions About Sternum Pain

Is sternum pain usually heart-related?

No. Most sternum pain is musculoskeletal. However, heart pain can sometimes feel central, so new or severe pain should be evaluated.

Can pressing on my sternum help determine the cause?

If pressing on the area reproduces the pain, it often suggests a musculoskeletal cause like costochondritis. However, this alone cannot rule out serious conditions.

Can poor posture cause sternum pain?

Yes. Slouching places strain on chest wall muscles and rib joints.

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When to Speak to a Doctor

You should speak to a doctor if:

• Pain lasts more than a few days
• It keeps coming back
• It interferes with daily activities
• You're unsure about the cause
• You have any risk factors for heart disease

And again, seek emergency care immediately if you experience chest pressure, spreading pain, breathing difficulty, fainting, or other severe symptoms.

It's always better to be evaluated and reassured than to ignore something serious.

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The Bottom Line

Sharp pain in your sternum can feel alarming—but in many cases, it's caused by inflammation, muscle strain, or posture issues. Conditions like costochondritis are common and treatable.

That said, chest pain should never be ignored. If your symptoms are new, severe, or accompanied by warning signs, seek urgent medical care.

If you're uncertain about what's causing your sternum pain or want to understand your symptoms better before seeing a doctor, take a few minutes to complete Ubie's free AI symptom checker for personalized guidance on your next steps.

Above all, listen to your body. When in doubt, speak to a doctor. Chest pain—especially around the sternum—is something worth taking seriously.