Transcutaneous electrical nerve stimulation (TENS) is a area-applied device that provides low voltage electrical current through the skin to produce analgesia. Corydalis would be the genus of the perennial flowering plant from the poppy household with about 400 species. The tubers of corydalis (corydalis yanhusuo yan hu suo; 延胡索) https://travismweip.tinyblogging.com/5-essential-elements-for-conolidin-to-replace-traditional-painkillers-81756336