TENS stands for Transcutaneous Electrical Nerve Stimulations. TENS is safe, drug-free solution for pain management. It is now one of the most commonly used method for acute and chronic pain management. TENS relieve pain by sending low voltage of electrical impulses to nerve fibers.

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How does TENS work?

TENS works by two different mechanisms:

  • First, electrical stimulation of the nerve fibers can block a pain signal from being carried to the brain. If the signal is blocked, pain is not perceived.
  • Secondly, the body has its own mechanism for suppressing pain. It does this by releasing natural compounds called endorphins which act as analgesics.

Medical professionals, physical therapists, and chiropractors have successfully used the TENStechnology for decades. Thankfully, TENS is now available to for everyone without a prescription. By effectively managing pain without drugs, TENS had allowed many people with chronic pain conditions, to resume their normal daily activity.


Electronic Muscle Stimulator (EMS) or Powered Muscle Stimulator (PMS) operate similarly by sending electrical pulses to muscle tissues. EMS is the elicitation of muscle contraction using electric impulses. The stimulation will enhance muscle toning and speed up recovery time by building new muscle tissue.

How does EMS OR PMS work?

EMS OR PMS works by following mechanism:

  • The pulses are generated by a device and delivered through electrodes on the skin in direct proximity to the muscles to be stimulated. The impulses mimic the action potential coming from the central nervous system, causing the muscles to contract.


In the United States, EMS devices are regulated by the U.S. Food and Drug Administration (FDA). In the last few years, EMS has received an increasing attention as a form of electrotherapy and muscle training. In medicine, EMS is used for rehabilitation purposes, for instance in the prevention of disuse muscle atrophy which can occur, for example, after musculoskeletal injuries such as:

  • damage to bones
  • joints, muscles
  • ligaments, and tendons

In health and fitness, EMS or PMS can be utilized as a strength training tool for healthy subjects. For athletes, EMS or PMS could be used as a post-exercise recovery tool.


The unit can operate on temporary relief of pain associated with sore and aching muscles in the lower back, upper extremities (arm), and lower extremities (leg) due to strain from exercise or normal household work activities. Our units can block a pain signal to human brain by delivering gentle electric impulses through electrodes placed on the skin to underlying nerve fibers. By doing so, your muscles will respond to the impulse by contracting and relaxing rhythmically as instructed by you through the unit. When muscle contracts as a result of a different signal, the chemical changes taking place within the muscles are similar to those associated with voluntary contraction as in “normal exercising.” These chemical reactions, which results from muscle contractions, utilizes glycogen, fat and other nutrients stored in the muscle. These resulting series of muscle contractions will enable an individual to build, tone, strengthen, combat flabbiness and improve contour.

 ITOUCH® has developed a culture of trust with our clients as not only a medical device but also a personal massager. We know every client is unique and we have developed a product line to match that diversity, and our all TENS EMS/PMS units are Class II FDA cleared to ensure safety and efficiency. For targeted, effective treatments, our devices allow users to choose between various massage modes, intensity, and treatment time for direct practical relief. Therefore, our customers find that they can save money and time using our handheld devices to at home, work or on the go for treatment wherever and whenever they need.

When TENS is used as an analgesic, patients are instructed to try different frequencies and intensities to find those that provide them with the best pain control. Optimal settings of stimulus parameters are subjective and are determined by trial and error. Electrode positioning is quite important. Electrodes are initially placed on the skin over the painful area, but other locations may give equal or even better pain relief such as:

  • over cutaneous nerves
  • trigger points
  • acupuncture sites

Patient comfort is a significant determinant of compliance and consequently the overall success of treatment. The intensity of the impulse is a function of pulse duration and amplitude. Greater pulse widths tend to be more painful. The amount of output current depends on the combined impedance of the electrodes, skin, and tissues.

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