TENS and EMS machines are often recommended as a way to help relieve pain. But what are these machines and how do they work? TENS machines use electrical stimulation to block pain signals from reaching the brain. EMS machines, on the other hand, work by stimulating the muscles to help improve circulation and reduce inflammation. So, which machine is right for you? TENS machines are generally considered safe for most people and can be used for a variety of different types of pain. However, they should not be used if you have a pacemaker or other electrical implants. EMS machines are also considered safe for most people, but it is important to consult with a doctor before using one. These machines can be helpful tools in managing pain, but it is important to talk to your doctor first to make sure they are right for you.