A Numerical Rating Scale (NRS) is a simple tool used to measure subjective experiences, such as pain or satisfaction, by asking individuals to rate their feelings on a scale, typically from 0 to 10. In this scale, 0 usually represents "no pain" or "no satisfaction," while 10 indicates "the worst pain imaginable" or "maximum satisfaction." This method allows for easy quantification of personal experiences. The NRS is commonly used in various fields, including healthcare, psychology, and customer feedback. It provides a straightforward way for professionals to assess and track changes in a person's condition or feelings over time, facilitating better decision-making and treatment planning.