There are many causes of thigh root pain, including external wind and cold, ligament strain, hip synovitis, lumbar disc herniation, and femoral head necrosis. Male patients should pay attention to the presence of varicocele, and female patients should be highly alert to the presence of femoral hernia. In addition to thigh root pain, different diseases can also have other more typical clinical symptoms that can be used for diagnosis and differential diagnosis. Hip x-rays, MRI and ultrasound are the most commonly used tests.