Pain in the groin area at the root of the thigh is seen in the following diseases: 1, the most common is hip joint disease, the body projection of the femoral head of the hip joint at the midpoint of the groin area, so hip joint disease can lead to pain in the groin area. For example, the more common ischemic necrosis of the femoral head, hip synovitis, hip tuberculosis and hip bacterial infection can cause significant pain in the groin area. 2, pain in the groin area at the root of the thigh may also be caused by digestive system diseases, such as inguinal hernia, inguinal hernia, etc. The protruding hernia canal can also cause pain.