Transcutaneous electrical nerve stimulation (TENS) is often a surface-applied unit that provides low voltage electrical existing with the skin to supply analgesia. Corydalis will be the genus of a perennial flowering plant in the poppy household with around 400 species. The tubers of corydalis (corydalis yanhusuo yan hu suo; https://bookmarkloves.com/story23211538/conoldine-alternative-natural-pain-relief-no-further-a-mystery