I have a tens unit that was perscribed specifically for my neck(cervical spine) I find that I get a great deal of relief from it. When I had my oreintation regarding how to use it absolutely nothing was mentioned about the carotied arteries. I find nothing in my use and care book regarding this either. As usual just thought I'd stick my oar in the water with this bit of info! JuanitaCG for George 73dx98