Electrotherapy belongs to the category of physical therapy, which is often used in sports medicine for muscle adhesion, inflammation and other injuries, but it also has the function of regulating central nervous system and plants, so it is also very useful in the field of health care for the elderly. The Jianlishou you mentioned should be a brand of physiotherapy instrument, but I think this kind of thing can be bought at home, but it can only be done under the guidance of a professional doctor before, otherwise it may have side effects or fail to play a corresponding role.