This document discusses pain management in nursing. It covers the physiology and nature of pain, different types of pain, factors that influence pain, and the nursing process for pain management. The nursing process involves thorough assessment of the client's pain, developing a diagnosis and treatment plan, implementing both pharmacological and non-pharmacological pain interventions, and evaluating the effectiveness of the pain management strategies. Barriers to effective pain management and different treatment settings like pain clinics and hospice are also addressed.