Pulled groin muscles are diagnosed alongside symptoms of pain and tenderness in the groin area, stiffness in the groin area, swelling, bruising, popping and snapping sensations, and general weakness in the adductor muscles, states Mount Sinai Hospital. Pain can also extend into the stomach, which may be described as sharp.
Pulled groin muscles are typically tears of microfibers in the adductor muscles, reports Mount Sinai Hospital. Adductor muscles are responsible for bringing the legs back to the body's midline as one would in a kick or a running motion. This muscle group is comprised of five muscles: pectineus, brevis, longus, gracilis and magnus. The adductor longus composes the muscles grouped from the pelvis to the thigh bone, while the adductor gracilis and adductor magnus extend all the way from the pelvis to the knee.
Strains and tears are more likely to occur during long sprints and when the muscles meet sudden resistance, such as when kicking a ball, according to SportsInjuryClinic.net. In these cases, sudden pain occurs that can transfer into the stomach. Immediate bruising and swelling are also often associated with torn groin muscles. Depending on the severity of the tear, an individual may not be able to continue immediate activities. Groin muscle tears are most likely to occur during intense bouts of physical activity without prior stretching.