When assessing acute post-operative pain, the validity, reproducibility and reliability of Visual Analogue Scale (VAS) and verbal Numerical Rating Scale (NRS) have been investigated extensively. The use of electronic version of VAS has been published in the recent 10 years yet publication related to its use in pain medicine were few. Jamison et al have shown good correlation between electronic VAS vs paper VAS on healthy volunteers using weight as the stimulus. In normal subjects as well as fibromyalgia patients, electronic form of VAS could be used to describe different levels of experimental heat stimulation.