Transcutaneous electrical nerve stimulation (TENS) is usually a surface area-applied unit that provides small voltage electrical latest in the skin to make analgesia. Corydalis is the genus of a perennial flowering plant in the poppy family with about 400 species. The tubers of corydalis (corydalis yanhusuo yan hu suo; https://conolidinepainrelief86526.ttblogs.com/18160774/not-known-factual-statements-about-alternative-natural-pain-relief-to-replace-traditional-painkillers