A hernia describes the movement of an internal part of a body through a weakness in muscle or its surrounding structures. This can occur in many parts of the body with the most common being around the groin. This will often appear as a lump or swelling and may be painful.
The adductor muscles on the inside of the leg bring the thigh back to a central position, these muscles are more commonly known as the groin muscles. During sport and exercise these muscles are put under considerable stress and can become damaged. In addition to resting the injured muscle many athletes use compression shorts to help with their rehabilitation.