Pain is one of the main symptoms involved in cancer patients receiving treatment or because of the disease itself. Approximately, 30% to 50% of cancer patients receiving treatment experience pain and 70% to 90% with advanced stages of cancer experienced moderate to severe pain. Reducing the pain and suffering of cancer patients is essential to delivering quality care. Pain experienced by cancer patients affects quality of life, physical functioning, social relationship, and mental health, pain often co-occurs with additional symptoms, such as fatigue, sleep disturbance, loss of appetite, and anxiety.