Transcutaneous electrical nerve stimulation (TENS) is usually a surface-used unit that provides lower voltage electrical latest in the skin to provide analgesia. Corydalis is the genus of the perennial flowering plant during the poppy family with over four hundred species. The tubers of corydalis (corydalis yanhusuo yan hu suo; https://www.proleviate.com/post/conolidine-an-alternative-natural-pain-relief-to-replace-traditional-painkillers