Ache Under Right Breast: Causes, Treatment & When to See a Doctor

Understanding an Ache Under Your Right Breast

An ache under the right breast can be distressing, especially when it comes on suddenly or persists without an obvious cause. This type of pain may stem from various systems—musculoskeletal, digestive, respiratory, or even hormonal—and can range from a dull ache to sharp, stabbing sensations. While many causes are benign and easily treatable, others may require prompt medical attention.

Understanding the underlying causes, knowing when to seek help, and learning how to manage or prevent this symptom is essential.

Musculoskeletal Causes of Right-Sided Breast Pain

Pain under the right breast is frequently tied to the muscles, ribs, or connective tissues in the chest wall.

1. Muscle strain

Overuse of chest or upper abdominal muscles—often from lifting, twisting, or exercise—can lead to localized pain under the breast. It may worsen with movement or deep breathing.

Signs it’s muscular:

• Tender to touch

• Improves with rest

• Sharp or pulling sensation with certain movements

2. Costochondritis

This is inflammation of the cartilage that connects ribs to the sternum, often on one side. It’s a common cause of non-cardiac chest pain and may mimic heart or lung issues.

Symptoms:

• Sharp pain that increases with coughing or deep breaths

• Tenderness when pressing on the chest wall

• Often triggered by injury or viral illness

3. Rib fracture or bruising

Even a mild trauma—like a fall or intense coughing—can cause a rib contusion or microfracture, resulting in pain just below the breast area.

Digestive and Abdominal Causes

Pain under the right breast may also be “referred pain” from organs located just beneath the rib cage.

4. Gallbladder problems (gallstones, cholecystitis)

The gallbladder, located beneath the liver in the upper right abdomen, can become inflamed or blocked—commonly due to gallstones.

Symptoms:

• Sudden, sharp pain under right rib cage or breast

• May radiate to right shoulder or back

• Often occurs after fatty meals

• May include nausea or vomiting

Gallbladder issues are more common in women, especially those over 40, and those who are overweight or have had multiple pregnancies.

5. Liver conditions

Hepatitis, liver abscess, or liver congestion due to heart failure can all cause discomfort in the upper right quadrant, sometimes described as aching under the breast.

6. Gastrointestinal disorders

Conditions like gas, bloating, irritable bowel syndrome (IBS) or gastritis can cause referred pain that feels like it originates near the right breast.

You might notice:

• Cramping or bloating

• Relief with passing gas or bowel movements

• Pain worsens after meals or when lying down

7. Hiatal hernia and GERD

A hiatal hernia occurs when part of the stomach moves into the chest cavity through the diaphragm. This can lead to gastroesophageal reflux (GERD), presenting with:

• Burning chest pain

• Bloating

• Aches or pressure under the breastbone

• Sour taste or heartburn

Respiratory-Related Causes

8. Pleurisy

Inflammation of the pleura (lining of the lungs) causes sharp, stabbing pain, especially with deep breathing, coughing, or sneezing.

9. Pneumonia or pulmonary embolism

More serious conditions like pneumonia or a blood clot in the lung (PE) can cause pain that radiates to the right side under the breast, often with:

• Shortness of breath

• Fever

• Rapid heartbeat

• Cough, sometimes with phlegm or blood

If you have these symptoms, seek emergency care immediately.

Hormonal and Breast-Specific Causes

10. Hormonal breast pain (cyclical mastalgia)

This pain typically relates to the menstrual cycle. Although commonly bilateral, it may occur more intensely on one side, often under the breast.

11. Fibrocystic breast changes

Lumpy or dense breast tissue can cause tenderness and pain, especially before menstruation. These benign changes are very common in women between 20 and 50.

12. Breast infections (mastitis)

Mostly affecting breastfeeding women, mastitis can cause pain under the breast, redness, swelling, and fever.

Rare but Serious Causes to Consider

13. Shingles

Before the rash appears, shingles (herpes zoster) can cause burning, tingling, or aching under the breast or along the ribcage on one side.

14. Breast cancer

While pain is not typically an early symptom, certain types of breast cancer (e.g., inflammatory breast cancer) can cause localized discomfort, swelling, or redness. Always seek evaluation for:

• New lumps

• Nipple discharge

• Skin dimpling or changes

• Persistent pain on one side

Differential Diagnosis: How Doctors Determine the Cause

To determine what’s causing pain under the right breast, your doctor may:

• Take a detailed history: Onset, character of pain, associated symptoms

• Perform a physical exam: Palpate the chest wall, abdomen, and breast tissue

• Order tests, depending on the suspected cause:

  • Chest X-ray or CT scan

  • Abdominal ultrasound (for liver or gallbladder issues)

  • ECG or stress test (to rule out heart causes)

  • Breast ultrasound or mammogram

Treatment Options for Ache Under Right Breast

Treatment depends on the underlying cause:

Cause	Common Treatments
Muscle strain	Rest, ice/heat, NSAIDs, physiotherapy
Costochondritis	Anti-inflammatories, physical therapy, posture correction
Gallstones	Low-fat diet, medications, or cholecystectomy
GERD/hiatal hernia	Antacids, PPIs, lifestyle/diet changes
Hormonal pain	NSAIDs, evening primrose oil, hormonal therapy
Mastitis	Antibiotics, warm compresses, continued breastfeeding
Shingles	Antiviral meds, pain relief
Lung infections	Antibiotics, rest, oxygen (if severe)

When to See a Doctor

Call your doctor if you experience:

• Pain lasting more than a few days

• Pain that worsens over time

• Difficulty breathing

• Chest tightness or dizziness

• Fever or chills

• New lump or breast changes

• Blood in cough or stools