Medically reviewed by Amy Kwan, PT A groin strain is an injury to your groin muscles, which connect your thighs to your lower abdomen. This injury occurs when the muscle fibers are pulled or torn, ...

When an intercostal muscle gets twisted, strained, or stretched too far, it can tear, causing intercostal ... see a doctor if they have a broken or bruised rib and: Diagnosing intercostal muscle ...