In clinical practice, the symptoms of numbness in the thighs are often found to be a common symptom, which may occur for the following reasons: 1, the patient’s thighs are overworked, standing for a long time, squatting for a long time, or even catching a cold, which may lead to poor blood circulation in the muscles of the thighs and numbness and woodiness. 2, the patient’s resistance decreases, such as colds, viral infections, etc., causing lateral femoral neuritis, and numbness and woodiness in the thighs, 3, lumbar spine problems, such as lumbar disc protrusion, compression of the dural sac and lead to thigh numbness, muscle weakness. After this symptom, the patient had better go to the hospital, after the orthopedic doctor examination, and then auxiliary examination X-rays, CT films, etc., to clearly diagnose what is the cause, and then according to the cause, and then take symptomatic treatment.