Transcutaneous electrical nerve stimulation (TENS) is usually a floor-applied device that provides small voltage electrical current with the skin to provide analgesia. Corydalis may be the genus of the perennial flowering plant in the poppy relatives with above 400 species. The tubers of corydalis (corydalis yanhusuo yan hu suo; https://raymondvrhwk.blogoscience.com/44318594/conoldine-alternative-natural-pain-relief-no-further-a-mystery