Heart disease remains the leading cause of death in the U.S. Left arm pain during a heart attack is common due to shared nerve pathways with the heart. Chest discomfort is a key heart attack symptom.

Muscle injuries, nerve pain, and kidney inflammation can all cause lower left back pain. Learn about these causes and more.

Diverticulitis, gas, and IBS are common causes of lower left abdominal pain. Kidney stones, ectopic pregnancy, or testicular torsion are more severe causes of abdominal pain. Consult a healthcare ...