What Causes Pain Below The Sternum? | Causes And Relief

Pain below the sternum sits in an awkward spot: high enough to feel like chest pain, low enough to feel like stomach trouble. That makes it hard to tell whether you are dealing with simple heartburn or something that needs urgent care. Understanding the main patterns behind pain below the sternum helps you decide how fast to act and what sort of help to seek.

This guide runs through the main groups of causes, patterns that raise alarm, and practical steps you can take while you arrange medical review. It does not replace care from a clinician, and any doubt about serious symptoms should lead straight to emergency services.

What Causes Pain Below The Sternum? Main Groups At A Glance

The area just below your breastbone lies where the lower chest and upper abdomen meet. Structures here include the lower end of the esophagus, the upper stomach, nearby ribs and cartilage, the diaphragm, and nerves that carry pain from the heart and lungs. Pain below the sternum can come from any of these areas, or from nearby organs that share the same nerve pathways.

In practice, most causes fall into a few broad groups: digestive conditions such as reflux, chest wall and rib problems, heart disease, lung disease, and less common causes such as anxiety, shingles, or referred pain from the spine. The table below gives a quick map of those groups and the sort of symptoms that often travel with each one.

Cause Group	Typical Pain Pattern	Urgency Level
Digestive (GERD, ulcer, spasm)	Burning or gnawing under breastbone, often after meals or at night, sour taste or nausea	Usually non-urgent but needs review if frequent or severe
Chest Wall (strain, costochondritis)	Sharp or aching, can be touched or pressed, worse with movement or deep breath	Often non-urgent but can mimic serious disease
Heart (heart attack, angina)	Pressure, tightness, or heavy pain in center or left chest, may spread to arm, jaw, back, with breathlessness or sweat	Emergency if sudden, intense, or with shortness of breath or collapse
Lung (clot, pneumonia, pleurisy)	Sharp pain with breath or cough, sometimes with fever, fast breathing, or cough with mucus	Often urgent or emergency, needs rapid assessment
Upper Abdomen (gallbladder, pancreas)	Deep ache or boring pain in upper middle or right abdomen, can reach through to back, nausea common	Urgent if severe, sudden, or with fever or vomiting
Other (anxiety, shingles, spine)	Varied patterns, from burning skin pain along a rib to vague tightness with racing heart	Urgency depends on the whole picture and risk factors

Those patterns overlap, so you cannot safely self-diagnose only from location. Medical teams always keep heart and lung causes in mind for central chest pain, as described by the Mayo Clinic chest pain guidance.

How Doctors Sort Out Pain Below The Breastbone

When you describe pain below the sternum, clinicians first test how likely life-threatening causes are. They listen to your story, check vital signs, and look for patterns that point toward heart attack, lung clot, torn aorta, or severe infection. Once those are excluded, attention shifts to chest wall, digestive, and other causes.

They often start with a few basic questions: When did the pain begin? Did it build up or start suddenly? Does it change with breathing, movement, or meals? Does it move into the arm, jaw, back, or between the shoulder blades? Are there symptoms such as shortness of breath, sweating, faint feeling, cough, fever, or black stools?

Features Of Chest Wall Pain Around The Sternum

Chest wall causes such as muscle strain or costochondritis often appear after a cough, stretch, fall, or heavy lifting. Costochondritis is inflammation at the joints where ribs meet the sternum, and sources such as the Cleveland Clinic note that it is a frequent cause of chest pain around the breastbone.

Pain from chest wall structures often behaves in fairly mechanical ways:

• It gets worse when you move your upper body, lift, twist, or take a deep breath.
• Pressing on the tender rib or cartilage can reproduce the pain almost exactly.
• Rest, gentle heat or ice, and over-the-counter pain relievers often ease symptoms over several days.

Even with a clear story of strain, medical review is still wise if chest wall pain feels severe, lasts longer than expected, or blends with other symptoms that point toward organs deep inside the chest.

Features Of Organ-Related Pain Below The Sternum

Pain from internal organs near the sternum often feels less linked to movement and more linked to blood flow, stretching, or acid irritation. Heart-related pain often feels like pressure, fullness, tightness, or a heavy ache rather than a surface sting. Lung-related pain often sharpens with deep breaths, especially if the lining around the lung is inflamed.

Digestive causes such as reflux or ulcer can bring burning or gnawing symptoms, often after meals or when you lie flat. Many people describe heartburn as rising pain from below the sternum toward the throat, with a sour or bitter taste. This pattern matches descriptions from the NIDDK information on GERD symptoms.

Digestive Causes Of Pain Below Your Breastbone

Digestive conditions are a very common source of pain below the sternum. That area marks where the esophagus meets the stomach, so acid reflux, ulcers, and muscle spasm often send pain there. The challenge is that digestive pain can resemble heart pain, so careful assessment still matters.

Acid Reflux And Gastroesophageal Reflux Disease (GERD)

Acid reflux occurs when stomach contents wash back into the esophagus. Mild reflux may happen after large meals or when you lie flat soon after eating. GERD is the chronic form, with frequent or severe symptoms such as burning pain behind the breastbone, sour backwash, and trouble swallowing.

Features that point toward reflux as a cause of pain below the sternum include:

• Burning sensation in the middle of the chest, often after meals or at night.
• Pain that eases with antacids or acid-lowering medicine.
• Regurgitation of sour fluid, hoarse voice, or chronic throat clearing.
• Worse symptoms when bending over, lifting, or lying flat.

Even when reflux seems clear, red flag signs such as unintentional weight loss, frequent vomiting, trouble swallowing, or signs of bleeding (black stools or vomit that looks like coffee grounds) call for urgent review.

Peptic Ulcer Disease And Gastritis

Ulcers and stomach lining irritation can cause deep, gnawing pain high in the abdomen that often feels just below the sternum. Pain may flare when the stomach is empty or a few hours after meals. Some people notice relief briefly when they eat, followed by return of pain later.

Certain medicines (such as long-term high dose anti-inflammatory tablets), alcohol, and infection with Helicobacter pylori bacteria increase the risk of ulcers. Severe, sudden pain with a rigid abdomen, shoulder tip pain, black stools, or vomiting blood points toward a medical emergency such as a bleeding or perforated ulcer.

Spasm, Gas, And Indigestion

Short-lived pain below the sternum after heavy, greasy, or hurried meals can come from simple indigestion, trapped gas, or mild muscular spasm in the upper stomach or esophagus. These episodes tend to pass within minutes to hours and often settle with rest, smaller meals, and slower eating.

Frequent indigestion, repeated bloating, early fullness, or nausea still deserves review, especially in older adults or anyone with a history of heart disease, because heart and digestive causes can overlap in complex ways.

Common Reasons For Pain Just Below The Sternum

So what causes pain below the sternum in many day-to-day cases? Two big clusters stand out: chest wall strain and long-running reflux. Both are common, both can be very uncomfortable, and both can mimic more serious disease.

Chest wall strain around the sternum often follows a trigger such as a new exercise routine, intense coughing, or a twist during work or sport. Costochondritis, which involves inflamed rib cartilage near the sternum, can stay sore for weeks. Pressing on the affected spot usually worsens the pain, which gives a clue that the source sits close to the surface.

Long-running reflux, on the other hand, tends to bring a pattern of burning behind the breastbone, sour taste, and sleep disruption. Over time, unrelieved acid can damage the esophagus, which is why medical care makes sense for frequent heartburn even if symptoms feel mild.

Heart And Lung Causes You Must Rule Out

Any new pain below the sternum deserves a quick scan for heart and lung warning signs. Even if it ends up coming from reflux or chest wall strain, missing a heart attack or lung clot can carry a very high price. Health organizations stress that chest pain should be treated as cardiac in origin until proven otherwise.

Heart Attack And Unstable Angina

A heart attack happens when blood flow in a coronary artery stops, usually due to a clot on top of a narrowed vessel. Classic symptoms include:

• Pressure, tightness, or heavy pain in the center or left chest, lasting more than several minutes.
• Pain or discomfort moving into one or both arms, jaw, neck, back, or upper stomach.
• Shortness of breath, cold sweat, sick feeling, lightheadedness, or sense that something is very wrong.

Some people, especially women, older adults, and people with diabetes, may have milder or unusual symptoms such as upper abdominal pain, fatigue, or shortness of breath with little or no chest pain. Any suspicion of heart attack means calling emergency services right away rather than driving yourself.

Pericarditis And Other Heart-Related Causes

Pericarditis is inflammation of the sac around the heart. It can cause sharp pain in the center or left chest, sometimes worse when lying flat and better when leaning forward. Breathing deeply may also aggravate it. Fever and a recent viral illness often sit in the background.

Other conditions such as aortic dissection (tear in the main artery) or severe valve disease can also send pain to the area below the sternum. These are less common than heart attack but are emergencies when they occur.

Lung Clot, Collapsed Lung, And Infection

A blood clot that travels to the lungs (pulmonary embolism) can cause sharp chest pain, rapid breathing, coughing, and sudden shortness of breath. Risk rises after surgery, long flights, pregnancy, or long periods of immobility. A collapsed lung (pneumothorax) can also cause sudden one-sided chest pain and breathlessness, often in tall, thin young adults or people with underlying lung disease.

Pneumonia and inflammation of the lung lining (pleurisy) bring chest pain that worsens with deep breaths or cough. Fever, chills, cough with mucus, and feeling generally unwell often sit beside the pain.

Warning Signs That Need Urgent Care

Some features around pain below the sternum demand fast action, even if you have had milder pain in the same area before. When in doubt, emergency services would rather see you and find a harmless cause than arrive late for a serious problem.

Warning Sign Pattern	What It Might Mean	Action To Take
Sudden chest or upper stomach pain with shortness of breath, sweat, or sickness	Heart attack, lung clot, torn aorta, or severe lung problem	Call emergency services immediately
Pain below sternum with black stools, vomiting blood, or coffee-ground vomit	Bleeding ulcer or other upper digestive bleed	Emergency assessment in hospital
Chest pain plus weakness on one side, confusion, or trouble speaking	Possibly stroke or combined vascular event	Call emergency services; do not wait
Pain with severe breathlessness, blue lips, or collapse	Life-threatening heart or lung event	Immediate emergency response
Persistent pain below sternum for days with weight loss or difficulty swallowing	Possible serious digestive disease, including cancer	Urgent clinic or specialist review

If you live alone, any episode of chest or upper abdominal pain that makes you feel faint, confused, or unable to stand safely should also trigger an emergency call.

When To See A Doctor About Pain Below The Sternum

Not every episode of pain below the sternum needs an ambulance, yet recurring or long-lasting pain still calls for medical input. A sensible rule is this: if you have had more than a handful of episodes, if the pain disrupts daily life, or if over-the-counter measures no longer help, book an appointment.

During a clinic visit, your doctor may carry out a physical exam, check blood pressure, listen to the heart and lungs, and order tests such as an ECG, blood tests, chest X-ray, or endoscopy. The exact plan depends on your age, risk factors, medicines, and the full story of symptoms.

Come prepared with a short record of your pain: when it started, how often it appears, what seems to trigger it, what makes it better or worse, and any treatments you have tried. That detail shortens the path to a clear diagnosis.

Home Measures For Mild Pain Below The Sternum

For people who have already seen a clinician and been told that their pain comes from reflux, mild chest wall strain, or another non-urgent cause, home care plays a large part in staying comfortable between visits. These steps do not replace professional treatment plans, yet they often help:

Diet And Meal Habits

Smaller, more frequent meals place less strain on the area below the sternum than large, heavy plates. Many people with reflux find that high-fat food, late-night eating, alcohol, coffee, and fizzy drinks worsen burning pain under the breastbone. Spacing the last meal at least two to three hours before bedtime can ease night symptoms.

Raising the head of the bed slightly, rather than stacking pillows under your head, can also help reduce night-time acid washback. Weight loss in people with central obesity often eases reflux symptoms as well.

Posture, Movement, And Breathing

For chest wall causes, gentle stretching and posture work can shorten recovery. Slumping for long periods compresses the area under the sternum, so regular breaks from desks or sofas help. Simple shoulder rolls, chest opening stretches, and deep breathing drills, as advised by your clinician or physiotherapist, can ease stiffness across the breastbone.

At the same time, more strenuous activity should wait until acute pain settles. Sudden twisting or heavy lifting on a sore chest wall can prolong symptoms.

Medicine And Self-Care Boundaries

Over-the-counter antacids or acid-lowering medicines may ease occasional reflux-type pain below the sternum. Over-the-counter pain relievers can help chest wall strain. Follow package directions carefully and avoid taking extra doses to chase relief.

Anyone with kidney disease, liver disease, heart failure, or a history of stomach ulcers should speak with a clinician before using anti-inflammatory tablets, as these medicines can irritate the stomach lining and interact with other treatments. Long-term daily use of acid-lowering drugs also needs medical oversight, since they are part of a broader treatment plan rather than a quick fix.

Key Takeaways: What Causes Pain Below The Sternum?

➤ Pain below the sternum often comes from reflux or chest wall strain.

➤ Heart and lung causes must be cleared first for new chest pain.

➤ Warning signs include breathlessness, sweat, faintness, or black stool.

➤ Frequent heartburn or indigestion needs medical assessment.

➤ Keep a symptom diary to help your doctor reach a clear diagnosis.

Frequently Asked Questions

Can Pain Below My Sternum Be Just Heartburn?

Heartburn is a common cause of burning pain behind or just below the sternum, especially after meals or when lying down. Sour taste, burping, and nighttime symptoms often sit alongside it.

That said, chest pain and upper abdominal pain can also come from the heart or lungs. If pain feels new, severe, or different from past heartburn, seek urgent medical help rather than assuming it is reflux.

How Do I Tell Muscle Pain From Heart-Related Pain?

Muscle or rib pain usually gets worse when you press on the sore spot, twist, lift, or take a deep breath. The pain often feels sharp or aching and stays in a small, well-defined area.

Heart-related pain tends to feel like pressure, heaviness, or squeezing in the center or left chest, often with breathlessness, sweat, or nausea. Any doubt calls for emergency assessment.

Is Pain Below The Sternum Normal During Exercise?

Mild stitch-like discomfort under the ribs during hard exercise can come from breathing patterns or digestive factors, especially after a large meal. Slowing down and adjusting breathing sometimes helps.

Chest or upper stomach pain during light activity or at rest, pain that spreads to the arm or jaw, or pain with breathlessness or dizziness is not normal and needs urgent review.

Can Anxiety Cause Pain Below My Breastbone?

Anxiety can tighten chest and abdominal muscles and raise awareness of normal sensations, which may lead to a sense of pressure or ache below the sternum. Rapid breathing can also bring chest discomfort.

Even when anxiety seems likely, medical teams still need to rule out heart, lung, and digestive causes first, especially if you have risk factors such as older age, smoking, or diabetes.

When Should Children With Pain Below The Sternum See A Doctor?

Children can have reflux, muscle strain, or costochondritis that causes pain around the sternum, particularly during growth spurts or after sport. Many cases improve with rest and simple measures.

Red flags in children include chest pain with faintness, trouble breathing, blue lips, fever, or pain after a chest injury. In those settings, seek urgent medical care.

Wrapping It Up – What Causes Pain Below The Sternum?

Pain below the sternum sits at a crossroads between chest and upper abdominal problems. Common everyday causes include reflux, indigestion, and chest wall strain, while serious conditions such as heart attack, lung clot, and bleeding ulcer can present in the same region.

If pain is sudden, severe, or comes with breathlessness, sweat, faintness, or signs of bleeding, emergency services are the right first step. For pain that comes and goes, or lingers without warning signs, a planned visit with your usual doctor allows careful testing and treatment.

By watching for patterns, noting triggers, and seeking timely care, you can move from worry and guesswork toward a clear understanding of what causes pain below the sternum in your case and a plan that keeps that area as calm as possible.