What could cause pain in the rib cage under the left breast?

Pain in the rib cage under the left breast could signal heart related conditions including heart attack. This requires immediate medical attention since a heart attack can be life-threatening. But chest pain doesn't always mean a heart attack. If the pain gets worse with movement or pressing on the area, it may be related to the muscles or bones rather than the heart.

A common non-cardiac cause is costochondritis, where the cartilage connecting your ribs to your breastbone becomes inflamed. The area under your left breast may feel tender. Sometimes, muscle strain from exercise, poor posture, or injury to the chest wall muscles may be responsible.

Another possibility is intercostal neuralgia, a condition where the nerves between your ribs become irritated or pinched. This can cause sharp, burning, or aching pain along the rib cage.

Issues affecting the organs in the area such as pneumonia, pleurisy (inflammation of the lining around the lungs), or acid reflux can also cause pain in this area.

If the pain persists or becomes bothersome, you can use Ubie's free AI-powered symptom checker to help identify possible causes and determine whether you should consult a doctor for proper evaluation and treatment recommendations.