The use of physiotherapy dates back to ancient times with the use of heat and cold having therapeutic effect [6][11]. For pain relief, various physiotherapy methods are used. Transcutaneous Electrical Nerve Stimulation (TENS) is one of the most popular electrotherapy devices which generate physiotherapeutic effect. This device can be used for wide number of applications such as lower back pain, neck pain, post-operative pain, myofascial pain [7]. By changing its various parameters, same device can be used to serve the purpose of different applications.