Sciatic nerve pain belongs to the category of lumbar and leg pain in Chinese medicine, and the evidence mainly includes internal and external causes. The external causes are directly related to the sensation of wind, cold and dampness. The sensation of wind will manifest as pain in the lower extremities. For patients who feel dampness, the main clinical manifestation is heaviness in the lower extremities, so consider taking Zuipiao Tang orally. For patients who feel coldness, the main clinical manifestation is pain and constriction in the lower extremities, so consider taking Ma Huang plus Fen Zi Tang orally. Patients with deficiency of liver and kidney, deficiency of qi and blood stasis, and lack of glory of qi and blood are seen to have clinical manifestations of sciatica. Nourishing Ying Tang. Patients with Qi deficiency and blood stasis, which are caused by Qi deficiency and weakness in propulsion, have numbness in the lower extremities, consider taking Huangqi Guizhi Wuwu Tang orally.