Introduction
Cancer constitutes an enormous burden worldwide that is expected increase due to the growth and aging of the population and because of the adoption of behaviours and lifestyle factors known to cause cancer. Every year at least 30,000 people are reported of suffering from cancer. Pain due to cancer is one of the most distressing symptom experienced by the patient at some or the other time during the course of treatment or disease, progression. ( REFERENCE) It is seen, globally, dealing with cancer pain is an important health problem for the health care professionals. According to Portenoy & Dhingra [2014] cancer pain is