Right lateral thigh muscle numbness is common for the following reasons: first, lumbar disc herniation, disc protrusion to the back lateral, can compress the right nerve root, causing right lateral thigh numbness symptoms, lumbar spine MRI and CT scan can clearly show the degree of disc protrusion and nerve root compression. Second, lateral femoral cutaneous nerve entrapment syndrome, clinical manifestations are sensory hypersensitivity, numbness and pain in the right lateral thigh, in severe cases, symptoms may also occur when walking, extending the waist and hip, which can be relieved after rest and aggravated when starting activities, examination reveals that palpation along the direction of the lateral femoral cutaneous nerve travel can find limited evoked symptom points, especially compression at the inguinal ligament, which can be used as a basis for diagnosis, lumbar hyperextension test and Positive hip hyperextension test.