Muscle Strain: This is often the most common cause of groin pain, resulting from overuse or direct injury to the muscles in the groin area, such as the adductor muscles. The pain is typically sharp and localized to the area of injury.

Inguinal Hernia: A protrusion of an organ or tissue through a weakened area in the groin, which can cause pain, especially when coughing, lifting, or bending. The pain may be accompanied by a palpable lump.
Osteitis Pubis: An inflammatory condition affecting the pubic bone and surrounding structures, often seen in athletes. It causes chronic groin pain that worsens with activity.
Sports Hernia (Athletic Pubalgia): A condition related to a weakness or tear in the abdominal wall, without a visible hernia. It's common in athletes and causes chronic groin pain.

Testicular Torsion: A medical emergency where the spermatic cord becomes twisted, cutting off the blood supply to the testicle. It causes severe, sudden pain and requires immediate surgical intervention.
Epididymitis: Inflammation of the epididymis, often due to infection. It can cause severe pain, swelling, and redness of the scrotum.
Appendicitis (with atypical presentation): Although appendicitis typically presents with abdominal pain, in some cases, especially if the appendix is located near the groin, it can cause groin pain. It's a surgical emergency.

Avascular Necrosis of the Femoral Head: A condition where the blood supply to the femoral head is disrupted, leading to bone death. It can cause groin pain, especially with weight-bearing activities.
Psoas Abscess: A collection of pus in the psoas muscle, which can cause groin pain, fever, and difficulty walking.
Lymphoma or Other Malignancies: Although rare, cancers such as lymphoma can cause groin pain due to lymph node enlargement or direct tumor involvement.