Sciatica is divided into primary sciatica, which is sciatic neuritis, and secondary sciatica. This is due to other causes leading to swelling and pain. Clinically, it generally manifests in the following six aspects: First, pain that is primarily limited to the distribution area of the sciatic nerve, including the back of the thigh, the back of the calf, the outer side, and the sole of the foot, as well as the lateral side of the dorsum of the foot. Second, muscle strength governed by the sciatic nerve begins to diminish. Third, there are fixed tender points. Tender points are located at the ischial notch or could also be at the exit of the piriformis muscle. Fourth, there are symptoms of sciatic nerve traction, such as positive limb elevation, or positive straight leg raise test and enhancement test. Fifth, the Achilles tendon reflex is weakened or absent, while the muscle penetrative reflex is abnormally heightened due to stimulation. Sixth pertains to abnormal sensations in the areas governed by the sciatic nerve, including reduced or absent sensations, reduced absolute vibration at the external ankle, and some very mild sensory disturbances.