What causes a sudden sharp stitch in the side of the chest when running?
1. Introduction A sudden sharp stitch in the side of the chest when running is primarily caused by localized muscle cramps in the diaphragm or irritation of the parietal peritoneum. This condition, clinically known as exercise-related transient abdominal pain, occurs when repetitive torso movement, altered breathing patterns, and reduced blood flow trigger spasms in the … Read more